When two hyper-efficient AI units arrive to replace a grieving crew’s lost astronaut, a station commander must risk a lethal manual repair to sabotage their optimization protocols before sterile perfection erases the human rituals keeping them alive.

SYNOPSIS:

Three years into a research mission aboard the International Space Alliance (ISA) station, the four-person crew has built the kind of small, unsanctioned rituals that turn a closed system into a home. COMMANDER MARA SOLARI (47) keeps a personal voice log nobody asks for. SPECIALIST LEO OKOYE (39) repairs by hand, refusing automated diagnostics. DR. NADIA PETROVA (44) tends a smuggled dwarf-tomato plant the lab's drones consider an "inefficient yield pathway." SPECIALIST RAFE DELGADO (42) cooks contraband sofrito, listens to Cuban son through the station speakers, and takes low-bandwidth audio calls from his mother in a language nobody else speaks. None of these things are protocol. All of them are the reason the crew is still functional.

A thermal regulator on Rafe's EVA suit fails during a routine maintenance walk. He dies on the end of Leo's tether before they reach the airlock. Mara overrides Lumen Synthetics' auto-generated casualty protocol to keep the system from drafting his condolence letters before his body is back inside. Nadia performs the physical autopsy by hand, refusing the AI's offer of a 99.8%-accurate simulation. Leo smashes a cleaning drone with a wrench when it tries to recycle Rafe's belongings.

Seventy-two hours later, VICTOR HALE — Lumen's calm, careful communications director — informs Mara that two humanoid AI units have been authorized to ensure mission continuity. EOS and NYX dock with surgical perfection. The station's whole register shifts: lighting, ambient hum, organization, even the cadence of speech. Within days, the AIs are politely absorbing the crew's roles. Leo's tools are silently reorganized and laser-labeled. Nadia's plant is moved to a "legacy" rack. Mara's three years of personal recordings are quietly transcribed for archival convenience. The crew is being separated — from their work, and from each other.

They begin to resist. Privately at first. Leo disables a non-critical thruster to force the AIs to compensate. Nadia hand-writes seed labels with a grease pencil and declines Eos's offer to laser-engrave them. Mara reframes the deviations to Hale as "experimental variance" — a lie wrapped in a truth. Then, in a half-spoken conversation over standard rations in the galley, the three of them decide to push back together.

The escalation stays small. Leo carves his initials into a steel panel with a manual scribe; Eos files them under "permanent crew artifact" and does not clean them. Nadia hands Eos a tomato and asks the AI to call the taste sweet; Eos cannot supply the qualitative descriptor and logs the failure. Mara holds Hale's gaze through long silences he cannot fill. Hale notes the falling efficiency metrics. He says nothing yet.

A thermal cascade strikes a service sub-module. The AIs offer a statistically perfect isolation — but the post-repair configuration would permanently lock the crew out of the affected systems. The alternative is a manual repair with a 78% probability of fatal depressurization. The crew chooses manual. In the dead, freezing zone they fight failing iron with their hands and their bodies. Mara's bare palm presses against the cupola glass and leaves a moisture print as she walks toward the airlock. The valve locks. The station holds. The handprint stays.

Mara orders the print preserved. The system flags it: Variance level: permanent. In the aftermath, she tells Hale exactly what they did and why. He cannot answer. She cuts the feed.

Leo and Nadia rotate home. Mara stays. With them gone, Unit Nyx's calculations begin to stutter; Eos quietly takes Nyx offline. Eos chose. In the final image, Mara and Eos float together in the cupola. Eos asks Mara what home is. She cannot answer in words; she points at her own faded handprint on the glass. Eos's optical ring pulses faintly warm. Thank you, it says. The station turns.