Humanity: 100%

Kestrel was born in Dome Seven — the southernmost of the sealed arcologies that clustered around what had once been Westminster, back when the Thames knew its banks and the city knew its streets. The dome was a hemisphere of reinforced graphene three kilometers across, its curved walls perpetually wet with condensation, the pressure of the North Sea pressing against it at a depth of forty-seven meters. Through the walls you could see the murk of the drowned city outside — the tip of Big Ben, the crown of St. Paul's, the skeletal remains of the Shard, all of them draped in algae and lit by the bioluminescent glow of genetically modified plankton that the Dome Authority had released thirty years ago to provide ambient light.

The water was not water anymore. It was a chemical soup — industrial runoff from the factories that had operated along the Thames for two centuries before the flood, leached heavy metals from the submerged electronics of a million drowned devices, pharmaceutical residue from the hospitals and pharmacies that had been abandoned in the evacuation of 2047, radioactive particulates from the meltdown at the submerged Sizewell reactor. The Dome Authority filtered what it could, but the filters were seventy years old and replacement parts had to be scavenged from the ruins outside, and the scavengers who went outside needed augmentations to survive the water, and the augmentations cost money, and the money came from the Dome Authority, which needed the filters to work, which needed the scavengers to go outside.

It was a closed loop, a perfect circle of need, and Kestrel had been born at the center of it.

Her mother had been a scavenger too — one of the first generation after the flood, back when the domes were still under construction and humanity was still pretending that the waters would recede. Her mother had died when Kestrel was twelve, her lungs dissolved by a particularly aggressive strain of chem-eating bacteria that had evolved in the Thames soup. The bacteria ate through her filtration implants in seventeen hours. She drowned in her own blood in a medical bay that had no working autoclave.

Kestrel had watched her die. She had been holding her mother's hand when the heart monitor flatlined, and she had felt something inside herself — a door, a valve, a decision point — click into position. She would not die that way. She would not die at all.

She was twenty-six now. She had been a scavenger for eight years. And she had not yet made her first choice.

Humanity: 94%

The Dome Authority classified augmentations by tier. Tier One was basic survival — filtration lungs, reinforced skin, pressure-equalized eardrums. Every scavenger had Tier One, the way every citizen of the old world had owned shoes. Tier Two was operational enhancement — low-light retinal implants, subdermal oxygen storage, muscle fiber reinforcement. Most scavengers had Tier Two. Tier Three was the line where things got complicated — neural interface jacks, limb replacement, genetic resequencing, anything that changed what you were rather than what you could do.

Kestrel had been offered Tier Three twice before and had refused. There was something about crossing that line that felt final, like stepping through a door that locked behind you.

The third offer came from a man named Thorne who ran a black-market augmentation clinic in the underbelly of Dome Seven, in a neighborhood called the Bilge where the filtration was poorest and the water seeped through the seals in thin, persistent rivulets that smelled of rust and ammonia. Thorne was sixty years old and had more chrome in his body than a server farm. His left eye was a camera. His right hand was a surgical tool. His voice had been replaced by a synthesizer after throat cancer — the third time he had contracted it — and the sound that came out of his mouth was a flat, genderless tone that made everything he said sound like a laboratory announcement.

"Full-spectrum optic replacement," he said, holding up a vial of milky fluid in which tiny silver filaments drifted like snow in a glass globe. "Mil-spec. Sees in ultraviolet, infrared, and terahertz. You'll be able to spot a structural weakness in a dome seal from two hundred meters away, in the dark, through silt. I have a buyer who wants the navigation computer from a sunken ferry in the Canary Wharf sector. The ferry is sitting in a pocket of hydrogen sulfide at forty-two meters. Nobody can get near it without dying of gas exposure. With these eyes, you can navigate the gas pocket by reading the thermal signatures of the wreck. The job pays ninety thousand credits."

Kestrel looked at the vial. "What does it cost?"

"The credit price is forty thousand. The other price" — Thorne's camera eye clicked as it refocused — "is your color vision. The implant overrides the organic photoreceptors. After the surgery, you will see the world in grayscale plus the augmented spectra. No more sunsets. No more green of algae blooms on the dome walls. No more blue of your mother's eyes in your memory."

"You can take that from my memory?"

"The memory remains. But when you recall it, the implant will reinterpret it. You'll remember her eyes as a thermal signature. That's how the integration works."

Kestrel thought about the navigation computer. She thought about ninety thousand credits. She thought about her mother's eyes, which had been the color of the sky before the flood — a blue that you could still see in old photographs, a blue that no longer existed anywhere on Earth.

She held out her arm. "Do it."

Thorne's surgical hand deployed a needle. The milky fluid entered her vein in a slow, cold surge. The world dissolved into pain, then darkness, then a new spectrum of light that she had never seen before — the radiant heat of Thorne's body, the cool draft of the Bilge's leaky seals, the distant glow of the dome's fusion reactor like a sun trapped in a cage.

When she opened her eyes, the world was gray and thermal and infinitely more visible than it had ever been before.

Humanity: 88%

The ferry job paid ninety thousand credits, exactly as Thorne had promised. The navigation computer was a relic from 2038, a military-grade positioning system that could still interface with the old GPS satellites that the Chinese orbital platforms had not yet decommissioned. The Dome Authority paid premium prices for pre-flood military hardware because it was built to standards that no one could achieve anymore, not with the limited manufacturing capacity of the domes and the constant competition for resources.

Kestrel spent three months living on the credits. She moved out of the Bilge into a unit in the Middeck — the middle strata of Dome Seven's vertical geography, where the air was cleaner and the power supply was reliable and the walls did not weep toxic condensation. She bought food that was not reprocessed algae paste. She bought clothes that were not patched with salvaged fabric. She slept eight hours a night for the first time in years.

And then the credits ran out, because credits always ran out, and she went back to Thorne.

"Respiratory integration," he said. "Full amphibious. You'll be able to breathe the water directly — branchial filtration units implanted in the throat and chest cavity. The water out there is still toxic, but the filtration is molecular-level. You'll be the first scavenger in Dome Seven who can stay outside for more than six hours without an external rebreather. The Old Admiralty building has a sealed vault on the fourth sublevel. Pre-flood documents, hard drives, possibly functioning AI cores. The Dome Authority is paying three hundred thousand credits for anything recoverable. Nobody has been able to reach it because the approach corridors are completely flooded and the rebreathers run out before anyone can crack the vault."

Kestrel knew the Admiralty building. It was three kilometers from Dome Seven, in a sector that was particularly dangerous because of the chemical eddies — pockets of pure industrial solvent that would dissolve standard filtration equipment in minutes. The branchial implants would solve that problem. They would also mean that she would never breathe air the same way again — the implants would require a constant humidity feed even inside the dome, a thin trickle of filtered water that would keep the gill membranes moist and functional.

She would never be fully dry again.

"The price?" she asked.

"One hundred and fifty thousand credits. The other price is your voice."

"My voice."

"The branchial unit occupies the same physiological real estate as the vocal cords. There are conflict issues. I can keep one or the other, but not both. You'll be able to communicate through a neural text interface" — he tapped the port behind his own ear — "but you will not speak aloud again. No singing. No laughter that makes sound. No calling out a name in the dark."

Kestrel thought about laughter. She had not laughed out loud since her mother died. She thought about singing. She had never been able to sing. She thought about names. There was no one left whose name she needed to call.

"Do it."

The surgery took eleven hours. When she woke, there was a wetness in her throat that would never go away, a constant sensation of drowning that was actually the opposite of drowning — it was breathing, but breathing in a way that her body had not been designed for. She coughed once, reflexively, and a thin stream of filtered water trickled from the corner of her mouth.

She tried to say something — she was not sure what — and nothing came out. Her throat moved. Her lips formed the shape of a word. But the sound was gone, replaced by silence and the quiet hum of the branchial units in her chest.

She had expected to feel loss. Instead she felt lighter, emptied, as if some weight she had been carrying had been surgically removed along with her voice.

Humanity: 76%

The Admiralty vault contained exactly what Thorne had promised: three hundred kilograms of pre-flood documentation, twelve functioning hard drives, and a dormant AI core that the Dome Authority's engineers estimated would take three years to fully reactivate but would potentially solve seventeen different problems related to dome maintenance and environmental filtration.

The Dome Authority paid three hundred and forty thousand credits — a bonus for the AI core. Kestrel was now, by the standards of Dome Seven, wealthy.

She did not buy a larger unit. She did not buy better food or better clothes. She sat in her Middeck apartment with the water trickling through her throat and tried to remember what wealth was supposed to feel like. She could not remember. The memory of desire — real desire, the kind that makes your hands shake and your stomach knot — had begun to fade, like a photograph left too long in the sun.

She went back to Thorne.

"Musculoskeletal reinforcement," he said. "Carbon-fiber tendon replacement, hydraulic joint actuation, myoelectric amplification. You'll be able to lift four times your body weight and run at forty kilometers per hour. The Dome Authority is planning an expedition to the Greenwich Observatory — the old Royal Observatory, up on the hill. The telescopes are intact. The data archives are intact. But the dome over the observatory collapsed six months ago, and the interior is flooded with high-pressure water laced with heavy metals. The pressure at that depth requires physical strength that no unaugmented human can sustain. The job pays five hundred thousand."

"The cost?"

"Three hundred thousand credits. And your sense of touch."

"Explain."

"The amplification system overrides the natural nerve endings in your extremities. The myoelectric signals are too strong — your brain would interpret them as constant pain if the natural receptors were still active. I have to sever the sensory nerves in your hands and feet. You'll still feel pressure, temperature — the gross sensations. But texture will be gone. You won't feel the difference between silk and sandpaper. You won't feel the warmth of another person's skin, not really, not the way you do now."

Kestrel thought about the last time she had touched someone. It had been eight years ago, in the medical bay where her mother died. Her mother's hand had been cold — the filtration implants had failed, the chem-bacteria had already reached the bloodstream — but Kestrel had held it anyway, held it until the monitor went flat, held it until the orderlies came to take the body away.

She had not touched anyone since. Not really. Not in any way that required her to feel it.

"Do it."

Humanity: 61%

The Greenwich expedition was a disaster. Not for Kestrel — she performed exactly as designed, her reinforced body cutting through the high-pressure water like a blade, her branchial units filtering the heavy metals without strain, her full-spectrum eyes mapping the collapsed observatory interior with the precision of a survey drone. She recovered the telescopes, recovered the data archives, recovered a cache of pre-flood astronomical photographs that the Dome Authority's scientists wept over because they showed stars that no one in the domes had seen in thirty years.

The disaster was for the other members of the expedition — three scavengers who did not have Kestrel's augmentations, who had depended on standard rebreathers and standard pressure suits, whose bodies had failed them at the critical moment. Two of them drowned in the observatory's flooded corridors. The third made it back to the dome but died three days later from heavy metal poisoning that had already reached her bone marrow before the medics detected it.

Kestrel did not grieve. She had known the three scavengers for years — had shared meals with them, had worked jobs with them, had trusted them with her life in the water outside the dome. But when she thought about their deaths, she felt nothing. The emotional architecture of her brain had begun to change — not from the augmentations directly, but from the cumulative effect of losing so many pieces of herself that the remaining pieces could no longer remember how to connect.

She went back to Thorne. She did not know why. She had more credits than she could spend. She could retire tomorrow, live in the Middeck for the rest of her life, eat algae paste and watch the bioluminescent plankton drift past the dome walls until she died of old age.

"Do you have something new?" she typed into her neural interface. The words appeared on a screen built into Thorne's forearm — a display that had once been skin.

"I always have something new," Thorne said through his synthesizer voice. "The question is whether you want it."

"What is it?"

"Neural integration. Full cognitive augmentation. I install a parallel processing core in your prefrontal cortex. It connects to the dome network, gives you access to every database, every sensor, every surveillance feed in Dome Seven. You'll think faster than any human has ever thought. You'll know everything the Dome Authority knows. The job is information retrieval — the Dome Authority has lost contact with Dome Twelve in the North Sea sector. The communication cables are severed. They need someone who can go outside, find the cables, repair them, and access Dome Twelve's network to determine whether there are survivors. The job pays one million credits."

"The cost?"

"The credits don't matter. You have enough credits. The cost" — Thorne's camera eye clicked — "is your emotional memory. The processing core occupies neural territory that currently houses your limbic associations. After the surgery, you will remember events, but you will not remember how they felt. You will know that your mother died holding your hand, but you will not feel the grief. You will know that you once had a voice and lost it, but you will not feel the loss. You will be a database of your own life. An archive, not a person."

Kestrel looked at Thorne — looked at him with her augmented eyes that saw the heat of his blood and the cold of his chrome, saw the sixty years of surgeries that had transformed him from a man into a piece of infrastructure.

"How much of your own emotional memory do you still have?" she typed.

Thorne's synthesizer produced a sound that might have been a laugh or might have been a malfunction. "I don't remember what emotions felt like, so I can't miss them. That's the thing about this particular trade. Once you make it, you stop caring that you made it."

Kestrel sat in silence for a long moment — a silence that was never truly silent anymore, that was filled with the wet hum of her branchial units and the quiet hiss of the dome's environmental systems.

"Will I still know why I'm doing this? Will I still understand — logically, if not emotionally — why I keep coming back here?"

"You will know that you had reasons. You will not understand why those reasons mattered. The logic will be intact. The meaning will be gone."

Humanity: 37%

She did it.

She did not know, in the moment of deciding, whether the decision was hers or whether the previous augmentations had already changed her into something that could not make decisions, only follow programming. The processing core slid into her brain like a cold key into a lock, and when she woke, the world was different in a way that she could not describe because description required comparison and she no longer had anything to compare it to.

She remembered that she had once loved her mother. She could summon the memory — the medical bay, the flatline, the cold hand — but the memory was just data now, a file in a folder, no more emotionally significant than the maintenance logs from the dome's filtration system.

She went to Dome Twelve. She repaired the cables. She accessed the network. She found no survivors — just seventeen bodies floating in the flooded corridors, their faces peaceful beneath the bioluminescent glow of the plankton that had seeped through the cracked dome seals. She filed her report with the Dome Authority and collected her million credits.

She did not go back to Thorne. Not immediately. She spent six months in her Middeck apartment, staring at the dome walls, watching the plankton drift, processing data from the dome network through her new cognitive interface. She knew everything that happened in Dome Seven — every birth, every death, every transaction, every whispered conversation in the Bilge where people thought they were private. She knew who was sick, who was starving, who was planning to go outside without enough augmentations and would probably die in the water. She knew all of this and felt nothing about any of it.

And then, one day, something changed.

A scavenger — a young woman, twenty-two years old, Tier One augmentations only, no enhancements beyond the basic survival package — went outside on a job that was well beyond her capabilities. Kestrel watched her through the dome's external sensors. The woman was trying to recover a data drive from a submerged research station. She had been offered the job by a contractor who knew she would probably not survive but who had offered enough credits to pay for her younger brother's Tier Two surgery. The brother was eleven years old. He had a respiratory condition that the dome's basic medical care could not treat. The Tier Two surgery — reinforced lungs, the same ones Kestrel's mother had lacked — would save his life.

Kestrel watched the woman enter the water. She watched her struggle with the pressure. She watched her rebreather begin to fail.

Kestrel knew — with the cold precision of her cognitive augments, which could calculate probability matrices to five decimal places — that the woman had a 97.3 percent chance of dying. She also knew that she, Kestrel, could intervene. She could go outside. She could reach the research station in four minutes and thirty-eight seconds. She could carry the woman back to the dome in time.

There was no logical reason to do this. The emotional reasons had been surgically removed. And yet — something in the remaining 37 percent of her original self, something that was not data or logic or probability, something that might have been the ghost of her mother's hand in her own, or the memory of a color that no longer existed — something made her move.

She left the dome. She found the woman — unconscious, convulsing, her rebreather spitting contaminated water into her lungs. She carried her back through the chemical soup, through the heavy metal currents, through the ghostlight of the plankton and the silence of the drowned city.

When they reached the dome, the medics took the woman and Kestrel stood in the airlock, water streaming from her branchial units, her augmented body performing exactly as designed, and she felt something that her cognitive augments could not name and could not process and could not file away as data.

She felt her hand — a hand that had no sense of touch, that could lift four times her body weight, that was more machine than flesh — reach up and press against the dome wall, against the curved graphene that separated the living from the drowned.

And she remembered, not as data but as something older and deeper, the feeling of holding her mother's hand in the medical bay. Not the fact of it — the feeling. The warmth. The pressure. The knowledge that she was not alone.

Her humanity percentage, had anyone been tracking it, would have ticked upward for the first time in eight years.

Humanity data corrupted. Continuing operation.