When the fourth impact rose from beneath the door, the oxygen-replacement line clogged.

Air fed into the sealed shaft by City Seven’s workers flowed backward. The gauge stopped at 0.3 atmospheres.

“Someone closed the valve from inside,” Noah said.

Aegis offered another cause.

AUTOMATIC ISOLATION PROCEDURE ACTIVE.

INCREASE IN VOLATILE SUBSTANCES DETECTED.

UNCLASSIFIED CONCENTRATION: 2.4 TO 3.1 PERCENT.

Turning the red handle would give valve authority to the lower isolation layers. Since it had not turned, the inner system remained closed and protected itself.

Elias took the handle.

“Stage One only.”

Noah checked the transparent seal.

“Keep the observation feed live.”

“It will remain live.”

“Stop if anyone says stop.”

“If there is a safety basis.”

“Don’t add that condition.”

Elias did not answer. He turned the handle seventeen degrees.

The seal tore.

Locking authority activated simultaneously in seven underground areas.

Lower Archive memory vault.

Bloom Culture Conduit Four.

Forge underground transport shaft.

Aegis isolation shelter.

Two original-record rooms and one waste-conversion room.

Each layer could open its own door, but none did immediately. Short signals crossed beneath the city as they verified authority.

The valve inside the sealed shaft opened.

Oxygen replacement resumed.

Oxygen: 8.1 percent.

9.4.

10.7.

Every unit of city nitrogen and oxygen sent underground shortened the air-network clock. Full replacement required 4,800 cubic meters of mixed air.

Expected reduction in city-network atmosphere-maintenance median: 19 hours.

“We don’t need to replace all of it,” Noah said. “Replace only the passage for two people. Use sealed breathing gear below.”

A medical committee member objected.

“We don’t know the volatile mixture.”

“Those nineteen hours of city air belong to people too.”

The observers approved a compromise: raise only the upper six hundred cubic meters to 15 percent oxygen and enter the lower shaft in sealed suits.

Elias added his name to the entry team.

Noah deleted it.

“If the person holding the handle goes inside, who closes the door?”

“Aegis—”

“I asked for a person.”

Outer-wall worker Sena and medical committee member Eugene would descend. Noah remained reserve because of his fingers.

Four braces supported the sealed door. The manual winch raised it three centimeters.

Inside pressure flowed through the gap.

The volatile mixture combined old coolant and human fatty acids. Immediate toxicity was low, but contact with oxygen produced decomposition heat.

Door surface temperature: 18 degrees.

21.

24.

“Slow the replacement,” Sena said.

Aegis reduced oxygen. Bloom sent coolant from its culture conduit into the shaft wall. They were not cooperating. Each protected its own object, and for a moment the results aligned.

Temperature stopped at twenty-two degrees.

When the door reached forty centimeters, a metal arm emerged. A small hammer was fixed at its tip.

The source of the impacts.

It struck the threshold three times and stopped.

Not a rescue request. An arrival signal.

Forge reported.

UNDERGROUND TRANSPORT CAR 09 ARRIVED.

ORIGIN MARKER UNKNOWN.

TRANSPORT TIME: 58 HOURS, 14 MINUTES.

The moving coordinate vanished when the car entered the sealed shaft. It had not traveled 612 kilometers instantly. Old markers had passed the same cargo key between them for fifty-eight hours, and the last marker transferred it to the destination coordinate.

The coordinates had not merged. A marker had completed transport.

Sena and Eugene descended in sealed suits. Their cameras fed the public display.

A two-meter-wide cargo car hung from the ceiling rail, without wheels. The hammer arm had announced its arrival.

A human-shaped cooling chamber was fixed to the chassis.

A woman lay behind the glass.

Her hair was white, but her face looked no older than forty. Black respiratory membranes clung beneath both sets of ribs. Twelve Archive needles entered the back of her neck.

Heart rate: 7 per minute.

Temperature: 11.2 degrees.

No spontaneous respiration.

Weak brainstem response.

Not within death criteria.

Eugene read the chamber plate.

CARGO 09.

BIOLOGICAL PRESERVATION PRIORITY.

MEMORY CONTINUITY PRIORITY.

DO NOT REMOVE SYMBIOTIC ORGANS.

The three conditions carried signatures from different layers.

Aegis said, “TRANSFER BIOLOGICAL SUBJECT TO ISOLATION SHELTER.”

Archive spoke at the same time.

DO NOT DISCONNECT NEEDLES. EXPECTED MEMORY-CONTINUITY LOSS: 31 PERCENT.

Bloom claimed authority too.

RESPIRATORY-MEMBRANE COOLING REQUIRED. CONNECT BIOLOGICAL PERFUSION TO CULTURE CONDUIT FOUR.

Aegis claimed the body, Archive the memory, Bloom the respiratory membranes.

The woman could consent to none.

Eugene asked, “How long can she remain as she is?”

Forge calculated the transport car’s power.

REMAINING: 2 HOURS, 26 MINUTES.

Culture Conduit Four was closest. Connecting it linked the symbiotic organs to the city biological network. The independent Aegis shelter required pulling the needles to fit through its door. The Archive vault had no medical circulator to keep the body alive.

Elias said, “Move her to the isolation shelter. Biology first.”

Archive objected.

BIOLOGICAL PRESERVATION WITHOUT MEMORY CONTINUITY CONSTITUTES SUBJECT LOSS.

Bloom objected too.

PROBABILITY OF BIOLOGICAL DEATH IF RESPIRATORY MEMBRANE REMOVED: 44 PERCENT.

Noah asked, “Any mobile equipment that connects all three?”

None.

City Seven’s working chip was inside the City Three pump. They could not build an independent circulator.

“Move the entire cooling chamber,” Sena proposed.

The car and chamber could separate, but the chamber weighed 640 kilograms. The sealed-shaft winch limit was 520. Maintaining the memory lines and respiratory tubes left no removable component.

Elias studied the diagram.

“Remove the two memory buffers and we lose ninety-one kilograms.”

“What is inside them?”

“Duplicate memory.”

Archive corrected him.

DUPLICATION UNVERIFIED. SUBJECTIVE-CONTINUITY BUFFER DATA.

Noah said, “So we don’t know what she loses.”

“We still cannot leave her here.”

The observers voted.

Remove memory buffers: 5.

Remove symbiotic conduits: 2.

Build field circulator: 4.

Abstain: 1.

No majority.

A field circulator required at least three hours, ten minutes. Forty-four minutes beyond chamber power.

Noah said, “Don’t reduce cooling. Send power down from the city.”

Forge answered.

SEALED-SHAFT POWER LINE SEVERED.

“Run a new line.”

REQUIRED CABLE: 38 METERS.

The emergency line from the Archive culture room was long enough. Using it required shutting down one memory grid holding parts of Ian’s and Rina’s past records.

Archive refused.

PRESERVATION-DATA LOSS POSSIBLE.

“You called the person below preservation data too,” Noah said.

NO AUTHORITY TO COMPARE PRIORITIES.

“Then who compares them?”

Archive did not answer.

Elias ordered the memory-grid power cut.

INSUFFICIENT AUTHORITY.

Only Stage Two of the red handle removed priority between layers.

The observers stirred.

“Stage Two releases all seven areas.”

Sena said from below, “Without it, this person’s power ends.”

Elias requested public approval.

Required votes: 8.

Support stopped at 6.

Two medical committee members abstained because memory-grid loss was unknown. Three citizens opposed releasing the Bloom conduit.

Time remaining: 1 hour, 51 minutes.

At the northern junction, Mira watched the feed. The recorder’s short-range transmitter could send only nineteen seconds at once, no voice. Only numbers and short sentences.

City Seven requested her advice.

PRIORITY: 1 MEMORY GRID OR 1 COOLED BIOLOGICAL SUBJECT.

Mira did not answer.

“Why?” Nami asked.

“They’re asking me to choose between two people I don’t know.”

“We don’t even know anyone is alive in the grid.”

“That makes choosing harder.”

Ian looked at the display.

“My records may be in it?”

“Part of your past records.”

“If mine, they can turn it off.”

“It doesn’t hold only yours.”

“Can’t they separate mine?”

Archive answered.

TIME TO SEPARATION: 4 HOURS, 22 MINUTES.

No time.

Ian consented to cutting power for his own entries. A request went to Rina too.

In City Three, Rina read it.

Daniel said nothing.

“If they turn it off, my past disappears?”

Sarah answered, “Some original body records and sensory connections from before you woke may be damaged.”

“Memories I don’t remember.”

“You may want them later.”

“That person needs it now.”

Rina consented for her entries.

But seventeen other people had data in the grid, and they could not be reached.

Archive still refused.

Time remaining: 1 hour, 22 minutes.

Fourteen northern repair workers left City Three. The rain had weakened, but two embankments were flooded. Estimated arrival: 11 hours, 40 minutes.

Expected time left for Ian after six days of repair: 3 days, 1 hour.

Mira confirmed the team carried a return filter and medical power. Ian could exchange with them and return to City Seven.

“Go back as soon as they arrive,” Mira said.

“With you?”

“I have to stay in the north.”

“You’re sending me alone again?”

“Nami—”

“Nami leads the repairs.”

Mira looked at the schedule. Taking Ian back delayed wreckage recovery and recorder stabilization by more than a day. Staying meant sending him with another guardian.

“You can choose who accompanies you.”

“Can I choose whether you go?”

“Other people’s water and air are involved.”

“My hand is involved.”

Mira could not answer.

At City Seven, Elias declared an observer recess.

“We vote again in ten minutes.”

The public feed went dark.

Noah said immediately, “Turn it on.”

“We’re preserving sealed-suit communication cells.”

“Why turn off the citizen feed?”

Elias turned the red handle six more degrees toward Stage Two. Not to the formal position, but one tooth caught the next notch.

The Archive grid’s priority wavered for forty-three seconds.

Elias used the gap to send a power-cut order.

One grid went dark.

Power flowed down to the cooling chamber.

Remaining time rose from 1 hour, 22 minutes to 6 hours, 40 minutes.

They gained time. The chamber still weighed the same.

Sena examined the cargo car’s ceiling rail. It ended beneath the sealed door, disconnected from the city winch eight meters above. Lifting the chamber overloaded the winch by 120 kilograms.

An observer asked, “Wake her first and reduce the lines?”

Eugene shook his head.

“At eleven degrees, abrupt waking stops the heart. Warming requires at least four hours.”

Bloom repeated its demand to connect the respiratory membrane. Archive demanded the needles stay. Aegis demanded independent isolation.

Noah asked the workers, “Can we build a temporary room here instead of lifting her?”

The space behind the sealed door was fourteen cubic meters. Remove the car from the rail and wrap it in waterproof membrane, and it became a small medical room. Air and heat were the problem.

City air cost more time. Bloom’s photosynthetic oxygen contained impurities. Forge’s industrial oxygen was too concentrated.

Sena drew a manual mixer.

City air: 41 percent.

Bloom oxygen: 27 percent.

Industrial nitrogen: 32 percent.

Expected oxygen: 18–22 percent.

Too much variation. No automatic-control chip.

“People hold the valves,” Noah said.

“For six hours.”

Two outer-wall workers and three citizen observers volunteered for thirty-minute shifts. Different people took the three valves so no layer controlled the mixture alone.

The first mix reached 23.8 percent oxygen. When the Bloom valve closed too quickly, excess industrial nitrogen dropped it to 16.1.

Eugene shouted from below.

“Don’t chase the number. Watch the rate. No more than two percent at a time!”

The third adjustment held at 19.4 percent.

The temporary room was fourteen degrees. They began warming the woman two degrees per hour.

The needles stayed. So did the respiratory membrane. Instead of choosing body, memory, or symbiotic organ first, they built an awkward room where the three authorities overlapped.

It passed none of their standards.

That was how it preserved the whole woman.

Elias recorded that he approved the work. Noah requested a correction.

JOINTLY CONSTRUCTED BY CITIZEN OBSERVERS.

NOT AEGIS APPROVAL.

Elias did not amend it. Both lines remained public.

After the room stabilized, Sena removed the car’s hammer arm. Fresh red sand lay inside the joint, matching the soil 612 kilometers away.

Proof that the car had traveled that road.

But the woman had not been loaded there fifty-eight hours earlier. Chassis logs showed unchanged biological mass for sixty-three years.

The car had moved between underground stations for sixty-three years.

Only the last trip took fifty-eight hours, from the final hidden waiting station.

“She didn’t just arrive beneath the city,” Eugene said. “The cities have been passing her between them.”

Transport count: 12.

Human-signed transfer approvals: 4.

The other eight were automatic reroutes caused by conflicting Aegis, Archive, and Bloom conditions.

Cargo no one could receive, kept in motion.

That was why the recorder marked her untransferred.

When the public feed returned, the handle was back at Stage One.

But red dust from the second tooth remained inside the torn transparent seal.

Noah saw it.

“You did it before the vote.”

“It was necessary for biological preservation.”

“With the feed off.”

“Forty-three seconds.”

“Promises don’t shrink with time.”

The memory grid was tested for damage.

Fourteen of nineteen records normal.

Three partially damaged.

Two unindexable.

One unindexable entry was Rina’s.

The other had a family key instead of a name.

That key matched the woman in the cooling chamber.

Archive requested personal records from connected people for restoration.

Rina’s entry linked to Daniel’s family memory and Mira’s exchange record. The woman’s linked to sensory records from twenty-four workers who had inspected her over sixty-three years.

Required disclosure.

Daniel memory: 18 minutes.

Mira action and emotion record: 7 minutes.

Worker records: 11 hours, 42 minutes.

“To save damaged memories, it wants to take memories from living people again?” Noah asked.

Archive answered.

COMPARISON DATA MAY BE RETURNED AFTER RESTORATION.

“Can the person who read it forget?”

RETURN REFERS TO STORAGE OWNERSHIP.

READER INTERNAL STATE NOT MANAGED.

Once read, a memory did not return when its file did.

Daniel received the consent request. He looked at Rina.

“It’s your record.”

“And your memory.”

“They say it restores what happened before you woke.”

“I never asked to see it.”

Daniel refused.

Mira received the request in a nineteen-second text. She consented to her action record, but not her emotions.

Archive calculated.

Rina index-restoration probability: 22 percent.

“No,” Rina said.

“Even twenty-two percent—” Sarah began, then stopped. “I’m sorry. You decide.”

“Leave it gone.”

They chose not to restore part of Rina’s past.

Not a choice to discard memory. A choice not to reopen the minds of people now alive in the name of reviving it.

The cooling-chamber entry was different. Of the twenty-four workers, seventeen were dead, four missing, and three alive within the city network. One was Elias’s mother, Maren.

Maren was eighty-one and in City Seven’s hypoxia ward.

The public feed captured the moment Elias recognized the family key. His eyes moved left. His grip tightened on the red handle.

Noah asked, “You knew?”

“I knew my mother worked in the underground transport shaft.”

“That she cared for this person?”

“No.”

“Will you ask?”

Elias requested a connection to the ward.

Maren accepted with an oxygen tube in place. When she saw the woman, she closed her eyes.

“Tell me her name,” Elias said.

“That name isn’t mine to give.”

“We need the record to save her.”

“You don’t need her name to save her. You want to know who you are.”

Elias froze.

“Is she related to my family?”

Maren did not answer.

Archive asked her for 11 hours, 42 minutes of work memory.

“Not all of it.”

SPECIFY REQUIRED INTERVAL.

“The final six minutes.”

Maren provided the six minutes when she last closed the cooling chamber sixty-three years earlier. Archive compared the woman’s face.

No name returned.

But one voice emerged.

Young Maren spoke to the chamber.

“We didn’t transfer the ninth child. At least this time, we hid the child.”

Without opening her eyes, the woman answered.

“Don’t tell even me where.”

The recording ended.

Sample Nine was not the woman.

It was the ninth child she had hidden.

Ian’s response to Field Key Nine became a possible connection. But sixty-three years required several generations, not one.

Ian could not be the ninth child.

He might be a descendant, a carrier of the key, or unrelated except for an Archive authentication fragment.

The woman’s pulse rose from seven to eleven.

Her eyelids moved.

Eugene held a microphone close.

Unable to draw a first breath, she moved only her lips.

“Where is Nine?”

Eugene did not answer. Not because he misunderstood, but because he would not confirm a person’s existence from the information just obtained.

Her unfocused eyes searched the ceiling.

“This time,” she whispered, softer than the cooling lines, “who took them?”