She woke up with a hammering headache that had less to do with the sedatives than with her rising apprehension about the run ahead of them, and listened halfheartedly as Arkady and Cohen talked through the bones of the run again. Her new wire jack itched atrociously, a nagging reminder of the irritation of the last few days in the union safe house. She reminded herself not to scratch it, scratched anyway, cursed Korchow, and brooded about staph infections.
Korchow and Cohen had infested the safe house like locusts, shunting haphazardly through Bella, Arkady, Ramirez until even Li hadn’t known who the hell she was talking to. Not that it would have made much difference; Cohen had been harder to talk to than Korchow recently. Was he just angry, or was this new distance more than anger, an obscure symptom of some shift in the tidal flow of the AI’s associated networks?
They had taken Cohen off-line for the run—dumped his systems into the Starling so that there would be no interstellar communications to give them away while they drifted off the station’s dark side. No shipboard comp could even come close to accommodating Cohen’s vast web of associated intelligences and enslaved subsystems, of course. Li doubted there was a self-contained net that big anywhere in UN space, outside of a few zealously defended corporate and military sites. So Cohen had dumped systems, left them behind, wherever “behind” was, and downloaded only what he thought was needed.
He had sworn it wouldn’t be a repeat of Metz, that when they powered down the Starling for the run and gave him control of the ship comp he would be there, willing and able to pull her out safely. But now that they were committed, all Li knew for certain was that Cohen, her Cohen, wasn’t there. He had stranded her in hostile space with no one to cover her back but a Syndicate agent and a stranger who didn’t seem to remember any of the promises the Cohen who claimed to be her friend had made her.
“Let’s go over it again,” said the disembodied ship’s comp voice that she still couldn’t think of as his. Li and Arkady settled at the narrow crew’s table, and they ran through the whole intricately choreographed plan again.
It was getting Li on-station that had been the real problem. And though it had taken days to work out the details, the solution was still the same blindingly simple one Li had spotted in the station schematics: the ventilation system.
Like most spacer-designed technologies, Alba’s O/CO2cycle was obsessively efficient. It built on existing systems, recycling every available piece of material and energy, rolling many problems and purposes into one solution. It pushed breathable air down the long curve of the station’s inhabited zones, insulated the station’s pressurized inner bladder, sucked excess CO2out into space, and powered the motors that turned the long dragonfly wings of the solar arrays. Air, warmth, and life-giving power all from one system. And the fuel that drove the system was always there, always free: space itself.
The pressure differential between the void outside and the full atmosphere of breathable air inside pulled freshly oxygenated air through the station, into the remote cold-storage bladders whose robot retrieval systems used no oxygen and created no CO2load. When the CO2-loaded air reached the end of its journey inside the life-support bladder, it flowed through vents into the soft vacuum of the station’s outer bladder, a second skin that provided insulation and radiation shielding, that protected the inner bladder’s life-support zones from the hard vac beyond the viewports.
The returning air served three functions in the outer bladder. First, it put a baffled, compartmentalized partial vacuum around the life-support bladder—a safety feature so universal in UN-designed stations that the station-killing blowouts of the colonial era were nearly forgotten, marked only by the sad little streams of wreckage that orbited so many periphery planets. Second, the rush of stale air venting the external turrets drove the big turbines that powered the solar arrays. Third, the turret vents served as a last line of defense against the parasitic plague that haunted all closed systems, orbital stations, and settlement biospheres alike: mold.
Mold thrived in the recycled, condensation-rich air of orbital stations, and an unchecked infestation could make a station uninhabitable in a matter of months. Some epidemics—and every station with any history remembered one or two of them—were so resistant that the only cure was to evacuate the station, void the atmosphere, and rebuild the O/CO2cycle with fresh flora. Alba’s turret vents had been designed with that in mind. Each turret contained both an outer and an inner vent. The outer vents opened into the unused space off the station’s outer rim. The inner vents opened into the huge oxygen-producing algae flats. Faced with an incurable mold infestation, the station engineers could open both inner and outer vents and blow algae, air, condensation, and mold out into open space.
What Li’s soldier’s eye had seen was that, stripped down to its bones, the emergency venting system was an airlock. The inner vent separated life-support zones from the soft vacuum of the outer bladder; the outer vent staved off the void outside. In normal operations the outer vents opened only during the turbine’s power cycles. The inner vents never opened, except in the worst emergency. However, if they could open an inner vent, briefly, while the outer vent was closed, all that would show up on the station monitors was a barely noticeable local pressure drop as a few cubic meters of air flowed into the unsealed turret. And someone who had managed to slip through the turbine arms and into the duct at the end of the last power cycle could simply push the miter vent open and breach the station’s inner bladder.
If that someone was small enough to fit through the vent. If she was fast enough to climb the turret in the few minutes between venting cycles. If she was strong enough to push the inner vent open against a full g of rotational gravity and hoist herself through it.
But Li was all those things.
It was a risky way in. If it worked, though, it would put Li on-station undetected, and already through the manned security checks that separated the top-security labs from the station’s unrestricted zones.
Korchow’s inside man would open the inner seal for her. This was Li’s least favorite part of the plan. It introduced a dangerously large risk of human error. It left her life hanging on the actions of someone she had never met and had no reason to trust. Worse, she had to be down the duct when the seal opened, ready to drop through instantly. And to get there, she would have to shinny twenty meters against a full rotational g, up a chute so narrow that even her small shoulders would just pass through it. If the door failed to open, if anything went wrong, if the inside man failed her, there would be no way out except through the spinning turbines.
Li had laughed when she saw the schematics and told Cohen it was a good thing she’d started smoking young. She wasn’t laughing now.
“Let’s go over the plan again,” Cohen said, when they finished the run-through.
Li rolled her eyes. They’d gone over it four times already—which was three more than she wanted to. “Cohen,” she said, “don’t waste my fucking time, okay?”
Arkady turned to look at her, surprised. Cohen had no body on board the little Starling, but his disapproval came through the comp boards loud and clear as a bad day.
“I need food,” Li said into the suddenly silent cabin, and pushed off toward the galley.
The galley racks yielded nothing but a small sack of algae-colored imitation kasha and a thoroughly squashed packet of reconstituted vegetables. The kasha tasted like mold, and the vegetables looked worse, but they were food. Li fought the urge to skip dinner, telling herself she had a long cold night ahead of her. She shook the bags to jump-start the internal heating elements, dumped the now-lukewarm contents into a battered suckbag, and drifted back toward the foredeck.