Halo Burn: What The Halo Remembers

The cobalt light of the implant pulsed against the inside of Cassia's eyelid, a slow metronome counting down to nothing. She counted it anyway. One. Two. Three. The safehouse smelled of solder and recycled air, of ozone and something older, like the dust in a grandmother's bookshelves after a long winter without visitors.

Yuen Park's hands moved with the deliberation of a man defusing ordnance. He sat across from her at the salvaged table, the kit unfolded between them like a surgeon's confession: microfilament leads, a calibration wand no thinner than a fingernail, the analog monitor whose green wash gave his lined face the color of old paper.

You are sure about this, he said. Not a question. A last chance to back out.

Cass opened her eye. The ceiling above the table was corrugated steel, stained at the seams with the ghosts of old leaks. Yuen's workshop occupied the back of the safehouse, partitioned by hanging thermal blankets that shifted in the breath of the building's ancient HVAC. Somewhere beyond the blankets, two Sovereign operatives were supposed to be on watch. She could hear one of them pacing, the soft percussion of a man pretending not to be nervous.

I am sure, she said. I need to see what is buried under the Halo data.

Yuen studied her for a long moment. His dark eyes held the particular weight of a man who had watched too many people volunteer for things they would not survive. Then he nodded, once, and reached for the calibration wand.

The implant stores in layers, he said, his voice soft and careful, the diction of someone who had grown up speaking two languages and had chosen precision in both. Recent on top, older underneath. Halo data sits at the bottom because it was the last thing it received before the wipe. If we go fishing for it, we pass through everything in between.

I understand.

Good. He lifted the wand and pressed its tip to the bare patch of skin behind her ear, just below the silver scar where the implant housing had been installed and later removed and reinstalled twice. The contact was cold. Then it was warm. Then it was something else entirely, a pressure that was not pressure, a sound that was not sound. Close the eye, Cassia. When I say breathe, you breathe. When I say hold, you hold. The memory comes up on its own. Do not chase it.

She closed the eye. The cobalt pulse disappeared, replaced by a deeper darkness, the kind that lives behind closed lids in windowless rooms.

The wand hummed at a frequency she felt more than heard. The vibration traveled down the nerves of her neck and pooled somewhere behind her sternum. She smelled copper. She smelled rain on hot asphalt, which made no sense in a basement beneath a city that had not seen real rain in eleven years.

Breathe.

She breathed. The safehouse noise thinned to a hush.

Hold.

She held. The darkness behind her eyelids began to brighten at the edges, the way a photograph develops in reverse.

The corridor came first. Emergency lighting, the kind that turns human skin the color of boiled shrimp. The alarm had stopped cycling, which meant someone had cut the feed, which meant Senna had done her job. Cass crouched behind a maintenance cart, her rifle disassembled into a carry sling across her back, and counted heartbeats. Hers. The scientist's. The two of them moving through the building's nervous system toward the freight elevator that would take them underground and away.

She could feel the fine tremor through the sleeve of his coat. The coat itself smelled of formaldehyde and coffee, of chalk dust and old paper.

Dr. Lior, she said, low. We have four minutes. The freight elevator is two floors down. Can you make it?

He looked at her. His eyes were the pale gray of a winter sky, and behind them lived the particular kindness of a man who had spent his life studying things that grew in improbable places. He smiled, and it was a sad smile, and he nodded.

I can make it, he said. His voice was papery, unhurried, the cadence of a lecturer who had never raised it. I am not as fragile as I look.

The maintenance cart had been positioned to cover the sightline from the security desk. She rose to a crouch and pulled him forward by the elbow. His footing was sure. Whatever his years had taken, they had left him the balance of a man who had walked miles on uneven ground.

Cass heard herself swallow. The sound was very loud in the corridor.

This is wrong, she said. You were supposed to stay retired.

Retired men do not get extracted from research compounds by young women with rifles, he murmured. The corner of his mouth twitched. I would have been disappointed.

They passed a junction. The walls were painted the sterile blue of a hospital corridor, but the paint was flaking and the baseboards were scarred with the boot marks of a hundred hurried evacuations. Somewhere above them, a generator coughed and resumed its low drone.

The freight elevator sat at the end of a short hall. Cass keyed the access code with her free hand. The door opened with a grinding sigh, revealing a steel box the size of a small room, lit by a single caged bulb. She guided the old man inside.

Once the door closed, she allowed herself to look at him properly. The face was thinner than she remembered. The beard was gone. But the shape of it, the brow, the way his eyes held the light, those had not changed.

You cut your hair, she said.

I cut many things. He set the satchel down at his feet and folded his hands over the handle. You look like your sister.

The words landed in her chest like a small, precise blow. She did not flinch. She had spent years learning not to flinch.

I look like myself, she said.

You look like Talia did, before she left. He tilted his head, studying her. The same stubborn mouth. The same way you hold your shoulders when you are afraid.

Cass's hand found the wall of the elevator and steadied herself against it. The metal was cold through her glove. The cage bulb threw her shadow across the scientist's face and broke it into pieces.

How do you know what Talia looked like before she left, she said.

Because I advised her, the old man said simply. On the night she went. I sat in her mother's kitchen and told her she was making a terrible mistake, and she smiled at me, and she went anyway.

The elevator began to descend. Somewhere far above them, a door opened and closed.

Cass opened her mouth to ask another question, but the memory tilted. The corridor and the elevator and the old man in the blue-lit steel box slid sideways, as if the implant had lost its grip on the recording. Yuen's voice came from very far away, calling her name once, twice, with the soft insistence of a man who knew how to wake people without breaking them.

Cass. Cass. Breathe. You are chasing it.

She tried to obey. She tried to come back to the safehouse. But the memory had other plans.

---

The next frame was not the elevator. It was a different room, smaller, with a window that looked out over a city Cass did not recognize. The scientist stood by the window with his back to her, the satchel on the desk behind him. Outside, the sky was the color of a bruise.

I did not ask why you wanted me out, he said, without turning. I assumed you would tell me when you were ready.

She had been ready for three years. She had never been ready.

Because Dorian Quill knows where you are, she said. Because he has been patient, and patient men are the most dangerous kind. Because if he finds you before we do, he will take what you know and he will use it to rebuild something you spent your whole life trying to dismantle.

The old man turned. The winter-gray eyes held her.

You have been thinking about this a long time, he said.

Yes.

He considered her. Then he crossed the room and took her hand, and his grip was warm and firm and utterly unscientific.

Then we should not waste it, he said.

The memory went white at the edges. Yuen's voice returned, closer now, threading through the static like a rope lowered into a well.

I have you, he said. Come back when you are ready. There is no rush.

Cass came back. The safehouse ceiling reassembled itself above her. The monitor's green light painted Yuen's face in the same color it had been before she went under. The thermal blankets had shifted, and a slice of corridor was visible beyond them. One of the operatives was sitting now, head bowed over a tablet. The other was gone.

Her mouth tasted of copper and old paper.

She opened her eye. Yuen was watching her with the stillness of a man waiting for a verdict.

She saw his face, she said. Dr. Casimir Lior. My old tutor. She paused. The one Dorian calls his mentor.

Yuen set the wand down with great care, as if it had become something heavier than it was.

That is not a small thing to find at the bottom of a Halo file, he said.

No, Cass said. It is not.

The depot's rec room smelled of instant coffee, solder, and the particular staleness of recycled air that had passed through too many lungs. Cass sat on a bench that had been bolted to the wall sometime during the war before this one, its cushioning long since compressed into a shape that remembered no one. A single overhead panel buzzed at a frequency just below hearing, and the fluorescent tube above her flickered in a rhythm that matched nothing.

Across from her, Dorian Quill sat with his hands folded in his lap. He had removed his coat. The lining was Sovereign-issue, dark gray, tailored in a way that suggested someone had measured him once and filed the numbers. He looked smaller without it. Or perhaps he had always been smaller, and the coat had done the work of making him seem larger, the way architecture makes a man seem like a monument.

Neither of them had spoken in eleven minutes. Cass knew because she had been counting the seconds against the drip of the condensation line that ran down the far wall, a slow arithmetic of waiting.

A Sovereign operative stood at the door. Then another. They had been posted there for hours, two men in tactical grays with their sidearms holstered but their hands loose, the posture of men who had been told to watch and not yet told what to do when watching became necessary. Senna Vale had passed through earlier, said nothing, looked at both of them as if they were specimens in adjacent jars, and left.

Cass had not slept. Dorian had not slept. The coffee in her cup had gone cold an hour ago and she had drunk it anyway, because the alternative was to acknowledge that she was thirsty, and acknowledging thirst meant acknowledging the body's claim on her attention, and she did not have attention to spare.

The silence broke the way old glass breaks: without warning, all at once.

I built the architecture, Dorian said.

Cass did not move. Her hands stayed around the cup. Her eye stayed on the middle distance, where the condensation line met the floor and pooled into a shape that meant nothing.

The targeting architecture, he said. For the original halo. Before they renamed it. Before they called it the Halo. Before it had a name at all that anyone outside the project was allowed to know. He paused, and his voice did something she had never heard it do: it thinned. I wrote the selection logic. I wrote the prioritization matrices. I sat in a room with four other people and I decided which neighborhoods would be processed first, which infrastructure nodes would be preserved, which civilian concentrations would be considered acceptable losses.

He looked at his hands.

I was twenty-six, he said. I had a grant. I had a title. I had a woman who made me tea every morning and asked me about my day and I said it was fine, and it was fine, because I did not yet know what fine meant. I did not yet know that I was learning a new word for something that had no name.

Cass felt the cold coffee settle in her stomach. She felt the bench under her, the bolts that held it to the wall, the faint vibration of the depot's generator three floors below, a pulse that ran through the metal like a second heartbeat.

She did not speak.

Dorian continued. He spoke the way he always spoke, in long sentences with careful pauses, but the architecture of the sentences had changed. There were no longer the theatrical hesitations of a man constructing an effect. There were only the gaps of a man trying to find the next true thing.

I left the project, he said. I told myself I left because I had learned too much. I told myself I left because I wanted to reform it from within. I told myself many things. He exhaled. None of them were entirely false, and none of them were entirely true. I left because the woman who made me tea asked me, one morning, why I had stopped sleeping. And I realized that she had been asking for three years and I had been answering without answering, and that the man she had married was not the man who sat at the table.

Cass thought of the file. She thought of the face she had seen at the bottom of it, Dr. Casimir Lior, her old tutor, the man Dorian called his mentor. She thought of how Yuen had set the wand down as if it had become heavier.

How many, she said.

Dorian looked at her.

In the original architecture. How many people did the selection logic identify as priority targets for the first deployment.

He was quiet for a long time. The fluorescent tube flickered. The operative at the door shifted his weight.

I do not know the exact number, Dorian said. I know the bands. I know the density estimates. I know that the figures I signed off on were presented to me as percentages, and that percentages, when applied to a population of that size, become a kind of arithmetic that stops behaving like arithmetic. It becomes weather. It becomes geology. It becomes something that happens to a landscape.

Cass set the cup down. The sound it made against the bench's metal frame was small and exact.

I killed seventeen people in my first year, she said.

Dorian did not move.

Not in operations. Not in defense. Seventeen people, in a year, who I could have saved and did not, or who I chose to end because the alternative was worse, or who simply died because I was in the room and the room was where the dying was happening. She paused. I have counted them. I count them. There is a list. I do not write it down anymore because I do not need to write it down. It is in me the way the depot's generator is in the floor. I feel it when I am still.

Dorian's hands had unfolded. They were open on his knees, palms up, as if he were waiting to receive something or show that he held nothing.

I do not know what to do with what you have told me, he said.

Neither do I, Cass said.

She looked at him then, fully, for the first time in hours. His face was the face she had known when they were both younger and neither of them had yet become what they would become. It was still that face, in the way that a building is still a building after the fire has moved through it. The shape is the same. The function is not.

I used to think, she said, that if I could find the man who built the thing, I would know what to do with him. I thought I would know whether to forgive him or end him or simply stand near him and let the proximity do the work. I thought the answer would be in the finding.

And? he said.

And you are sitting across from me, she said, and I have not found anything. I have only found a man who is also carrying a number he cannot put down.

Dorian was silent for a moment. Then he said, quietly: Seventeen.

Seventeen, she said.

He nodded, slowly, as if confirming a weight.

I do not know my number, he said. I know the bands. I know the estimates. I do not know the names. He looked at his open hands. You know the names. That is worse. And it is better.

Cass did not know what to say to that. She let it sit between them, the way Yuen had taught her to let difficult things sit, without reaching for them or pushing them away.

The operative at the door cleared his throat. The other one did not move.

Outside the rec room, somewhere deeper in the depot, a door closed. The sound traveled through the walls and arrived as a low vibration, the kind that lives in the chest rather than the ears.

Dorian said, I have spent years constructing a theory of how the regime could be reformed from within. I have spent years believing that if the right people were in the right rooms, the architecture could be redirected, the selection logic could be made to choose differently. I have spent years telling myself that the thing I built could be unmade by the same hands.

He looked up.

I am not certain I believe that anymore.

Cass watched him. She thought of the file. She thought of Lior's face, the gentle eyes, the way he had adjusted his glasses when he was about to say something important. She thought of how Yuen had held her hand in the memory and said then we should not waste it, and how the words had landed in her like a stone dropped into a well that had no bottom she could see.

I do not know what I believe either, she said. I know what I have done. I know what I will do. The middle is unclear.

The middle, Dorian said, is where most of the damage happens.

Yes, she said.

The fluorescent tube flickered again. The condensation line dripped. The operative at the door shifted his weight from one foot to the other, and the sound of his boot against the floor was the only new sound in the room for a long time.

Cass picked up the cold coffee. She did not drink it. She held it, feeling the ceramic against her palms, the warmth that was no longer warmth, the memory of warmth that the cup had been asked to carry.

You should sleep, she said.

Dorian did not respond. He was looking at the wall, at the condensation, at the shape the water made when it reached the floor.

Cass set the cup down again.

Neither of them slept. The night continued. The depot hummed. The operatives stood. Somewhere, deeper in the building, Senna Vale was doing whatever Senna Vale did in the hours when the rest of them were supposed to be resting, and the work of not sleeping went on, and on, and on.

The condensation dripped. The depot hummed. Cass had begun to count the intervals between drips, had reached forty-seven and lost track, had begun again at one, when the world split.

Not slowly. Not gently. The halo chose violence.

It began behind her left eye, a pressure like a thumb being pressed hard into the bone, then a flash of white so total that she could not tell if her eyes were open or closed. She heard herself make a sound. It was not a word. It was the sound a body makes when something inside it has been forcibly rearranged, a wet and graceless noise, the noise of meat against meat.

"Cass." Dorian's voice came from very far away, then very close, then nowhere at all. "Cassia. Look at me."

She was not in the depot anymore.

She was standing in a corridor. The corridor was white. The light was the kind of light that has no source, that seems to live in the walls themselves. There was a hum here too, but a different hum, a Sovereign hum, the hum of buildings that have been told what to be.

She knew this place.

She hated this place.

She knew it because the halo knew it. The halo had been here. The halo had been here when she was not. The halo had carried this room inside her like a splinter she had not known was there.

At the end of the corridor, a door. The door was open. Through the door, a larger room, a room with a table and four chairs and a window that did not look out onto anything. Two figures in Sovereign grey. A third figure, standing, her back to Cass.

Cass tried to move. She could not. She was a viewer only. The halo had taken the controls.

The figure turned.

Talia.

Younger. Two years younger. The same face Cass saw in mirrors when she was brave enough to look, the same jaw, the same eyes, the same way the hair fell across the forehead. Talia was wearing a grey jacket Cass had never seen before. On the left breast, over the heart, a small silver pin in the shape of a closed eye.

The induction pin. The first pin. The pin they gave you on the day you stopped being a person and became an asset.

Talia was smiling.

It was the smile Cass remembered, the one that had always made her feel like the world was a kinder place than it actually was. It was the smile she had been missing for two years, the smile she had catalogued in the dark of the depot and tried not to think about. It was here. It was real. It was being worn by a living woman who was standing in a Sovereign induction room and accepting a pin and smiling.

"Talia," Cass said. Her voice did not reach the room. The room continued without her.

One of the grey figures spoke. A woman, older, clipped, the accent of someone who had been trained to speak as if every word were a small controlled explosion. "Do you understand the terms as they have been explained to you?"

Talia's smile did not waver. "I do."

"Do you accept the obligations as they have been set forth?"

"I do."

"Do you accept that your previous affiliations have been dissolved, and that any future contact with persons associated with those affiliations will be considered a violation of the Sovereign Accord?"

Talia hesitated. The hesitation was small, a flicker in the eyes, a breath held half a second too long. Then she said, "I do."

Cass felt the word land in her chest like a stone dropped from a height. Talia had been resistance. Talia had been Yuen's student. Talia had been the one who had taught Cass how to pick a lock, how to read a room, how to tell when a man was lying by the way he held his shoulders. Talia had been all of this, and now Talia was saying I do, and the pin was on her chest, and the pin meant that everything Talia had been was now an affiliation, and that contact with that affiliation was a violation, and that Cass, by the terms her sister had just accepted, was now a violation.

The older woman extended her hand. Talia took it. They shook. The handshake lasted exactly three seconds. Then Talia turned toward the door, toward the corridor, toward Cass, and for one moment, one single and terrible moment, Talia looked directly at her.

Into her.

Through her.

Past her.

As if Cass were not there. As if Cass were glass. As if the sister Talia had sworn to protect was now a piece of scenery, a piece of furniture, a thing to be walked around.

Then Talia walked past her, and the corridor was empty, and the door closed, and the memory ended, and Cass was back in the depot with her cheek against the cold table and her mouth full of copper and Dorian kneeling beside her saying her name again and again like a man knocking on a door he could not be sure was occupied.

"Cassia. Cassia. Look at me. Look at me."

She looked at him. The depot was the depot. The condensation was dripping. The fluorescent tube was flickering. The operative at the door had not moved, or had moved and moved back, and the room was the same room it had been, and she was the same woman she had been, except that she was not, because she had just seen her sister alive.

"What did you see?" Dorian asked. His voice was very controlled. His hand was on her shoulder. His hand was warm.

Cass opened her mouth. She closed it. She opened it again. "She is alive."

Dorian did not speak.

"Talia is alive. She was inducted into Sovereign. Two years ago. The day she disappeared. She did not die. She was not taken. She walked in. She took the pin. She said I do."

The words came out flat. They had no inflection. They had the inflection of a thing that has been broken so many times that it no longer makes a sound when it breaks again.

Dorian's hand tightened on her shoulder. "The halo can be played. It can be fed false memories. You cannot trust what you saw."

"I know what I saw."

"You know what the halo chose to show you. There is a difference."

"There is not a difference. Not tonight. Not about her."

He looked at her for a long time. The condensation dripped. The operative at the door shifted his weight. Somewhere in the building, a clock chimed the hour, the sound muffled and far away, like a bell heard from underwater.

"You cannot act on this," Dorian said.

"I know."

"If you go after her, you will die. Or worse, you will be turned. Or worse than that, you will find her, and she will not be who you remember, and you will have to make a choice you are not ready to make."

"I know."

"Then tell me what you are going to do."

Cass sat up. She wiped her mouth with the back of her hand. The copper was still there. She looked at the red on her knuckles. She looked at Dorian. She looked at the operative at the door, who was watching them now, who had been watching them this whole time, who had heard what she had said, and who was already composing the message he would send to whoever it was he reported to.

She did not care. She was past caring. She was standing in a country she had not known existed, and the country was made of her sister's face.

"I am going to finish what we came here to do," she said. "I am going to walk into that room tomorrow. I am going to stand in front of Dorian Quill and pretend to negotiate. And when the moment comes, the moment we have been building toward, I am going to be ready. Because if I am not, then Talia dies. If I am not, then all of this was for nothing, and Talia was right to leave, and Yuen was wrong to keep me, and I was wrong to come back, and we all might as well lie down in the dirt and wait for the grey to cover us."

Dorian watched her. His face did not change. His hand left her shoulder.

"And after?" he said.

"After, I find her."

"And if she is what you saw?"

Cass looked at him. She looked at him the way she had looked at him the first time they met, when he had been a young strategist with soft hands and a soft voice and a future he had not yet ruined. She looked at him the way she had looked at him when he had taught her what the word betrayal could mean in practice, when he

had taken her into the back room of his apartment on Atrekka and shown her the folder marked EYES ONLY, the folder with Talia's name in it, the folder that had contained everything he had not yet become but was, even then, willing to become. She looked at him now, in this room that smelled of ozone and old paper, in this country made of her sister's dreaming face, and she said, "If she is what I saw, then I will know her anyway. I will know her the way I have always known her. I will know her by the way she laughs when she is trying not to laugh. I will know her by the way she holds a cup of tea with both hands. I will know her by the scar on her left wrist from when she fell out of the pecan tree when she was eleven and I was nine and I carried her home because she could not walk. If she is what I saw in that screen, if she is only what Dorian Quill has made of her, then I will find the part of her that is still my sister and I will bring her back or I will die in the room where I find her. That is the only promise I can make. That is the only truth I have left."

Dorian watched her. The neon of the maintenance strip caught the edge of his jaw, the rim of his glasses, the small muscle that jumped near his left eye when he was calculating.

"You always were a poet," he said. "When you should have been a surgeon."

"I was never a surgeon, Dorian. I was always a poet. You were the one who thought I was something else."

He did not answer that. He turned his head toward the door, toward the operative who had heard everything, toward the small ceremony of witnessing that had just taken place. Cass saw the calculation finish in his face. She saw him decide, with the speed of long practice, what to do with what he had just heard. He did not signal the operative. He did not move. He only said, very quietly, in the voice that had once told her that he loved her, that he would always love her, that he would do anything for her if she would only trust him one more time, "Then we will see what kind of poet you are in the morning, Cassia. We will see whether the verse you have prepared is equal to the occasion."

He left her standing there. The operative followed him. The door sealed. The hum of the place returned, and the hum was the sound of Talia's face, the sound of grey pressing at the edges of everything.

Cass stood alone in the corridor and breathed. The air tasted of copper. The light smelled of nothing. She reached into the inner pocket of her coat and took out the small flat case that Yuen Park had pressed into her hand at the airstrip, at the edge of the ruins, in the last hour before dawn. She had not opened it. She had not needed to. She had known what was inside since Yuen had described it, in his careful voice, in the language of someone who had spent his life taking beautiful things apart in order to understand how they could be made to kill.

She opened it now. Inside, nested in grey foam, lay a single cartridge the size of her thumb. The casing was Sovereign make. The label had been stripped. In the stripped place, in Yuen's tiny, precise hand, were four words: FOR THE LONGEST NIGHT.

She understood, then, what Yuen had done. She understood why he had not come with her. She understood why he had stood at the airstrip with his hands in his pockets and his face turned away from her, the way a man turns his face away when he cannot afford to be seen. He had given her the only thing he had left to give. He had given her the device that could, in the right room, at the right moment, do the one thing the Sovereign had never been able to defend against, because it was not a weapon in any sense the Sovereign recognized. It was a key. It was a key cut from the Sovereign's own materials, by Sovereign hands, in a Sovereign lab, and smuggled out by a man who had once believed the regime could be taught to be better and had learned, instead, that it could only be unmade.

Cass closed the case. She put it back into her pocket. She stood for a long moment in the humming corridor and let the weight of what she was about to do settle into her body, into her breath, into the place behind her sternum where her sister's name had lived since she was nine years old and Talia was eleven and the pecan tree had let her fall.

Then she walked to the small chamber that had been assigned to her, the chamber with the narrow cot and the grey blanket and the cup of water on the ledge, and she lay down, and she closed her eyes, and she did not sleep.

---

Dorian Quill sat in his own chamber three floors above and watched the diagnostic readouts scroll across his screen. The readouts were Talia Vex's readouts. They had been Talia Vex's readouts for two years. They showed, in pale green numerals, the steady decay of a consciousness held open by force against its own will. They showed the moments when the will surged, when some stubborn interior spark lifted the numbers briefly, when something that was still Talia pushed back against the current that held her. They showed, too, the longer drifts, the slow flattenings, the grey tides that came and did not entirely recede.

He watched. He had been watching for two years. He had been watching since the night he had stood in the chamber with the door sealed behind him and watched the technicians bring her in, sedated, soft in the restraints, her head shaved in the places where the contacts would go. He had watched her eyelids flutter. He had watched the first wave go in. He had watched the readouts spike and then, slowly, begin to flatten. He had watched the mouth of the woman he had once loved form a word that had no sound, over and over, a word that might have been a name. He had told himself, in the weeks after, that it was necessary. He had told himself that it was the only way to keep the resistance from finishing what it had started, the only way to keep the Vex archive from being reconstructed, the only way to keep the names of the dead in their proper graves. He had told himself many things.

He had not told himself that he was afraid of her.

He was afraid of her. He had been afraid of her since the moment he had first seen her, in a hallway in the old Sovereign compound on Atrekka, when she had been twenty-three and he had been twenty-six and she had walked past him with a cup of tea in both hands and had not looked at him at all. He had spent the next six months engineering a way to meet her. He had spent the next two years learning the way she laughed. He had spent the year after that learning the way she grieved, the way she argued, the way she held her body when she was about to do something brave and was not yet sure it would work. He had learned her so thoroughly that when she had finally left, when she had finally understood what he was and what he was willing to do, he had felt, for a long time afterward, that he had been flayed.

Now she was upstairs. He could feel her the way you feel a change in pressure before a storm. He watched the readouts. He watched the numbers hold, and hold, and hold.

He put his hand flat on the desk. He breathed.

"Morning, then," he said, to no one.

---

In the small chamber, Cass did not sleep. She lay with her hand over the cartridge in her pocket and she listened to the hum of the place and she let the sound become, in her mind, a kind of song. The song was the song of the Halo, the song of the place where her sister had been held for two years, the song of the long grey night that had covered them all. She had learned the song from her sister, years ago, in the kitchen of the house where they had grown up. Talia had sung it when she was washing dishes. Cass had never known the words. She had only ever known the tune.

She lay in the dark and she hummed the tune, very softly, so that no one in the corridor could hear. She hummed it the way you hum a thing you are about to need. She hummed it the way you hum a thing you are about to give away.

In the morning, she would walk into the room. In the morning, she would stand in front of the man who had taken her sister. In the morning, she would pretend to negotiate. In the morning, when the moment came, the moment that Yuen had built for and she had walked across a ruined continent to reach, she would take the cartridge from her pocket. She would place it in the slot that the diagnostic rig required, the slot that only a living hand could open, the slot that Dorian himself had designed, years ago, before he had understood what his designs would be used for. She would place the cartridge in the slot. She would speak her sister's name into the quiet room. And the key would do what keys do.

She did not know, exactly, what the key would do. Yuen had told her only that it would open. Yuen had told her only that Talia would hear. Yuen had told her only that the long grey night would, at last, be over.

She lay in the dark. She hummed the tune. Somewhere above her, the readouts held.

In the morning, she would find out what her sister remembered.