The breach alarm was not, technically, her problem.
Mira Chen-Vasquez had been off-shift for eleven minutes, had just removed her boots, and was in the process of deciding between the rehydrated noodles and the rehydrated something-that-claimed-to-be-curry when the station's breach alarm began its three-tone sequence — not the emergency cascade that meant hull failure, but the lower-grade persistent tone that meant something had gone wrong in a sector that someone should probably go look at. The tones were color-coded in the manual: this one was yellow-orange, which meant Concern But Not Catastrophe.
The station had a maintenance crew. Mira was on that crew, but she was off-shift, and the off-shift protocol was clear: secondary team handles yellow-orange, primary team rests.
She ate three bites of rehydrated noodles.
Then she put her boots back on.
Veltara Station was home to forty-seven thousand people, which was not enough to qualify as a city by most historical definitions but was certainly enough to fill every corridor with noise and heat and the accumulated presence of human beings who had been living in close quarters for, in many cases, their entire lives. Mira had been born on Veltara — her mother had been a hydroponics technician, her father a structural analyst who'd spent thirty years crawling through the station's bones and knew them better than he knew his own face. She had grown up understanding that the station was not a vehicle. It was not going anywhere. It was not a waypoint or a temporary measure. The generation ships had brought humanity here three hundred years ago, the star had begun its slow collapse sixty years after that, and Veltara Station had been built, expanded, fortified, and slowly made into the only home anyone under forty had ever known.
You didn't survive a dying star by waiting to be rescued. You survived by keeping the systems running.
This was the philosophy Mira had inherited from her father and refined through twelve years of maintenance work. She was good at it — not brilliantly gifted in the way some engineers were, not possessed of any innate mechanical intuition, but diligent and thorough and capable of sustained attention in the way that unglamorous crucial work required. She found the leaks other people missed. She replaced the seals before they failed rather than after. She kept three sectors of the station's water reclamation system running at 97% efficiency when the manual called for 85%, because she felt, personally, that 85% was a moral failure.
The breach was in Sector 14-G, a maintenance corridor that ran along the outer hull between the agricultural rings and the residential stack. Mira reached it seven minutes after she'd put her boots back on, passed two members of the secondary team who were standing in the corridor looking uncertain, and found the problem: a seal joint at connector point 14-G-47 had developed a hairline fracture. Not a breach in the dramatic sense — no air loss, no structural compromise. But the fracture ran along a stress line that Mira knew from two years of intimate familiarity with this sector, and if it was allowed to develop, it would reach the secondary hull layer within approximately six weeks.
"Why are you here?" asked Secondary Tech Dorin, a young man with enormous earnest eyes who had been on the crew for eight months.
"I was hungry," Mira said, pulling out her scanner.
"You're off-shift."
"I'm aware." She ran the scanner along the fracture. The readout confirmed what she'd expected. She marked the coordinates, designated it Priority-2, and began making notes in the maintenance log with the methodical thoroughness that had once caused a supervisor to describe her, not entirely as a compliment, as "the most reliably human thing on this station."
"The secondary team could have handled it," Dorin said.
"The secondary team," Mira said, not unkindly, "was standing in the corridor looking at it. You'd been here for four minutes."
He had the grace to look slightly abashed. "We were assessing."
"Mm." She finished her notes. "I've logged it Priority-2 and designated it for repair at the start of next cycle. The fracture is stable for now. Don't touch it, don't stress the joint, and make sure the vibration dampeners in the adjacent section are running at spec."
"What if they're not?"
"Then fix them." She straightened, rolled her neck, felt the familiar ache of a body that spent too much time in crawlspaces. "That's what we're here for."
She made her way back through the connector corridor, past the agricultural ring where the hydroponic lights were cycling into their night sequence — a gentling of the spectrum from growth-white to rest-amber that Mira had grown up thinking of as sunset, because it was the closest thing to one she'd ever known. A few of the night-cycle farmers moved between rows of grain with the quiet efficiency of people working in a space they understood completely.
In her quarters, the noodles had gone cold.
She ate them anyway. She was reading the quarterly maintenance report when the light in her quarters changed: a brief pulse of blue-white, there and gone so quickly she nearly missed it. She looked up. Looked around. Saw nothing unusual.
Then she looked at her workbench, where she'd placed the object she'd found last week during a routine inspection of Sector 9's outer hull access ports.
It was a tile. Ceramic, dense, etched with symbols that didn't match anything in the station's records. She'd logged it as salvage — probably pre-station, possibly from the original generation ships — and had kept it because she was curious and because the symbols felt deliberate in a way she couldn't articulate.
It was glowing.
Blue-white. Soft. The color of space seen through a clean viewport.
Mira set down the maintenance report. She picked up the tile. Text formed on its surface, letter by letter, as if being typed by an invisible hand:
YOU HAVE BEEN SELECTED FOR THE CROSS-WORLD SURVEY. REPORT TO ACCESS PORT 9-DELTA AT DUSK-CYCLE. BRING NOTHING YOU CANNOT CARRY.
Mira read the message. She read it again. She turned the tile over and found the back blank and cool.
Then she set it back on the workbench and finished eating her noodles, because she had learned a long time ago that important decisions made on an empty stomach were usually bad ones.
Afterward, she sat very still for a while, thinking about what it meant for a message to say cross-world when the only world she had ever known was this one.
The agricultural lights finished their cycle. The station hummed around her, forty-seven thousand lives suspended in the dark.
She picked up the tile again.