The Cartography of Falling Light

The airlock cycled open with a sound like a jaw dislocating, and Lily Vasquez has never once regretted the word relay in a station's name. Relay Station Kethara is a rust-brown scar on the edge of charted space, and the gravity inside it is wrong, a low lateral shove that buckles knees and makes you question whether the floor still knows which direction is down. She's here to finish the cartography: the last complete map of the station's navigational lattice before the light systems fail and the charts go dark forever. But the maps aren't the reason her hands are shaking. Dr. Fen Harrow is already in the corridors, already waiting, already speaking in a voice she heard once on a voicemail from Mira, her sister, the one referenced in every file but never once present. And Cael Orin watches from the observation deck with knowledge in his eyes that shouldn't exist, knowledge about what happened to Mira that no official log contains. The station is dying in real time. The light is falling in geometric patterns across the hull, and each pattern is a coordinate, each coordinate is a choice, and the choice is simple: finish the map and let Kethara go dark, or follow the one line on the chart that doesn't lead to an exit, the line that leads to Fen's cabin and the voicemail she's been too afraid to play a second time. Lily has twenty corridors to cross and one light to follow before the station swallows them both. She can chart the fall and walk away with the data, clean and complete. Or she can let the map stay half-finished, press play on the message, and let the only coordinate that was never on any chart pull her into the rust-brown dark where the gravity is wrong and the man who's been waiting is the only fixed point left in a universe that's spinning her sideways. The light is falling. The cartography is almost done. And the last line of the map leads not to a station, not to a relay, but to a door that's been waiting for her name.