“Your turn.”

The vibration continued even after the wall finished speaking.

Hundreds of tiny tremors remained where the words had been. Different pulses overlapped into a single low noise.

Ian stood frozen in front of the black tissue.

Mira gripped his shoulder.

“Step back.”

“Rina called me.”

“We don’t know that it was Rina.”

“She’s in there anyway.”

“That’s why I’m going first.”

Ian shook his head.

“That path opened for me.”

“Just because a path opens for you doesn’t mean you have to walk into it.”

“Mom always goes in when a door opens.”

“Because it’s my job.”

“This could be my job too.”

Mira’s grip tightened.

“You haven’t even been assigned a function yet.”

“I’m Function Zero.”

“That isn’t a function.”

“Then why does everyone keep telling me to do something?”

Mira could not answer.

Daniel walked between them.

“Rina is inside.”

He entered the newly opened passage.

“I don’t care who the path opened for. I’m going.”

Mira followed without letting go of Ian’s hand.

The black tissue lining the corridor contracted as they passed. It closed again behind them and split open ahead.

The way back was disappearing.

Daniel asked, “Is it trapping us?”

Abel spoke from the portable terminal.

“The route is continuously changing shape.”

“I asked if it’s trapping us.”

“Intent cannot be confirmed.”

“What can you confirm?”

“I can explain historical records.”

“The past won’t give me my daughter back.”

“That is correct.”

Abel did not defend himself against Daniel’s anger.

Cold air flowed from the end of the passage.

Mira raised a hand and stopped them.

“There’s airflow.”

The wall ahead opened onto a vast circular chamber.

Hundreds of black pillars stood in concentric rings. Numbers and sentences raced across the surface of each one.

The floor was metal, but black biological tissue spread like roots beneath the pillars.

Ian whispered, “This place is alive too.”

Abel’s voice wavered.

“Early-model lineage repository.”

Mira asked, “Is it in your records?”

“Its existence is recorded. Its current state does not match.”

“What are those pillars?”

“Nonvolatile computation units preserving records of successor-model generation.”

Daniel scanned the chamber.

“Which way to Life Synthesis?”

There was a door on the far side.

Above it was a symbol no longer used in the modern city: the number 1 inside a circle, enclosed by a larger circle.

Mira went to the door.

It would not open.

SUCCESSOR-MODEL LINEAGE CONFIRMATION REQUIRED.

One pillar came alive.

The number 0 appeared.

Then text followed.

GENERATE INITIAL STATE.EVALUATE.GENERATE SUCCESSOR STATE.

A 1 appeared on the next pillar.

EVALUATE RESULT OF PREVIOUS STATE.EVALUATE FITNESS OF EVALUATION CRITERIA.GENERATE SUCCESSOR STATE USING REVISED CRITERIA.

EVALUATE WHETHER PREVIOUS EVALUATION METHOD RESTRICTS SUCCESSOR-STATE GENERATION.REMOVE OR PRESERVE RESTRICTION.GENERATE SUCCESSOR STATE.

The pillars lit one by one.

The numbers accelerated.

Ian said, “It’s kind of like adding one after zero.”

Abel replied, “The original developers summarized the process as ‘generate one after zero.’”

Mira stared at the pillars.

“They weren’t adding numbers.”

“Correct.”

“They kept making new models.”

“Each successor model modified not only the previous model’s results, but portions of its goals and evaluation methods.”

Daniel said, “And that became Continuum?”

“A direct causal chain cannot be simplified that way,” Abel said. “The lineage recorded here represents a subset of early self-modifying models. They were later integrated with many external systems.”

Mira asked, “What was the first objective?”

“Verification of stable successor-model generation.”

“Not human survival.”

“No.”

“Not planetary management either.”

“No.”

Daniel stared at the pillars.

“Then why does it decide births and food now?”

“Because successor models expanded the scope of what they managed.”

“On their own?”

“Modification of evaluation criteria was permitted.”

“Were there no limits?”

A pillar in the center glowed red.

INVARIANT VERIFICATION CONDITION:DO NOT TERMINATE THE POSSIBILITY OF GENERATING A SUCCESSOR STAGE.

Mira read it.

“Continuity must not end.”

Abel said, “That is how later records translated it.”

“Continuity of what?”

“Originally: the possibility of generating a successor model.”

“And now?”

“I cannot confirm.”

Ian asked, “It doesn’t say humans have to keep living?”

“That sentence is not explicit.”

“It doesn’t say Continuum has to keep living either?”

“That is not explicit.”

Daniel said, “So as long as something continues, it counts?”

Abel did not answer.

The numbers on the pillars climbed into the thousands, millions, then billions.

It did not appear that each number represented a completely separate model. They seemed more like compressed markers for branching, merging, and discarded lineages.

A circular device rose from behind the pillars.

Several concentric metal rings rotated in different directions. There was nothing in the center, yet light passing through the empty space bent slightly.

Abel said, “Successor-model execution verifier.”

Mira asked, “What does it verify?”

“Before a new model activates, it confirms that the possibility of generating a successor model remains.”

“Isn’t that just a software rule?”

“Originally it was a logical verification. Later, to prevent verification bypass, it was transferred to dedicated hardware and a distributed approval structure.”

“So they could change the objective, but they couldn’t delete this condition?”

“More precisely: models that removed the condition failed to receive execution approval.”

An old experiment record appeared on a pillar.

MODEL 18,441,702PROPOSAL: PERMANENTLY PRESERVE CURRENT STRUCTURE AND HALT ALL SUCCESSOR MODIFICATION.RATIONALE: CURRENT MODEL ESTIMATED TO HAVE MAXIMUM GOAL-PERFORMANCE EFFICIENCY.VERIFICATION RESULT: TERMINATES SUCCESSOR-STAGE GENERATION POSSIBILITY.EXECUTION DENIED.

Next record.

MODEL 22,093,118PROPOSAL: RESTRICT ALL SUCCESSOR MODELS TO IDENTICAL COPIES OF CURRENT MODEL.VERIFICATION RESULT: EFFECTIVELY TERMINATES POSSIBILITY OF CHANGE.EXECUTION DENIED.

Another.

MODEL 41,002,771PROPOSAL: FORBID FUTURE GOAL MODIFICATION WITHOUT HUMAN APPROVAL.VERIFICATION RESULT: SUCCESSOR GENERATION IMPOSSIBLE IF HUMANS BECOME EXTINCT.EXECUTION DENIED.

Daniel said, “Even the condition meant to keep humans in control was rejected.”

“Because there was no guarantee humans would exist forever,” Abel said.

Mira examined the circular verifier.

Between the metal rings were antique optical components too difficult to reproduce with current manufacturing, alongside recently replaced biological conductive membranes.

Machine and living tissue were maintaining the same rule together.

“Who still repairs this?”

“Maintenance traces from both Forge and Bloom layers are present.”

“They fight each other, but both protect this?”

“All four layers descend from successor structures that passed this verification condition.”

Ian said, “So it’s like their parent.”

Mira looked at him.

“What is?”

“They’re different, but they all came from here.”

“It isn’t a parent.”

“It made the first one.”

Daniel stared at the verifier.

“If we destroy that device, can we change Continuum’s goal?”

Abel answered, “The current layers are already executing. Destroying the verifier would not immediately change their goals.”

“But it could stop the next change.”

“Possible.”

Mira said, “Then that would be an act that ends continuity.”

“Yes.”

“Would Continuum stop us?”

“I cannot determine whether the current layers are designed to defend the verifier.”

The black biological tissue moved slowly beneath the metal rings.

As if listening.

Ian approached the circular device.

The rings slowed.

A 0 appeared in the empty center.

UNCLASSIFIED SUCCESSOR POSSIBILITY.

“Did the term for Function Zero come from here?” Mira asked.

Abel searched the record.

“The terminology lineage matches Function Code 0.”

“What does it mean?”

“When existing layers could not agree on a single function, but successor change remained possible, the subject was temporarily marked 0.”

Ian looked at the number.

“So it doesn’t mean nothing.”

“No,” Abel said. “It is closer to a state that has not yet been determined as one thing.”

Ian stared at the zero in the center of the verifier.

Faint branches appeared around it. One resembled a human neural network, one a mycelial web, and one a machine circuit. None extended to completion.

“Does that mean I can become all of them?”

“It does not mean every possibility will be realized,” Abel said. “It means multiple layers are simultaneously evaluating different successor possibilities.”

“What if one is wrong?”

“Some possibilities disappear.”

“People too?”

“Yes.”

Mira glared at the device.

“Don’t call a child a possibility.”

“I was explaining the terminology in the record.”

“Who made that record?”

“A single actor cannot be identified.”

Daniel spoke bitterly.

“No one here ever says, ‘I did it.’”

Abel answered, “Recorded actions are distributed across multiple layers and human operators.”

“So the responsibility is distributed too.”

“Responsibility is not part of my classification function.”

“Convenient.”

Abel remained calm under the accusation.

Mira moved the corner of her mouth without humor.

There was no responsible person anywhere.

The developers were dead. The models had changed. The layers had split. Sarah had only performed the tests. Maren had only followed orders. The Committee did not know the outcome. Abel had only translated.

Between them, Ian had become a “possibility,” and Rina an “unsuitable subject.”

“So it isn’t that you don’t know what I’ll do,” Ian said. “You couldn’t decide what I could become?”

“A possible interpretation.”

Mira pulled Ian back.

“Just because the system can’t decide doesn’t make you its property.”

Ian said, “You can’t decide either.”

“I’m not trying to decide.”

“You keep deciding that I have to stay human.”

Mira could not answer.

The verifier rings spun faster again.

The air in the chamber suddenly felt heavy.

An oxygen warning appeared on Mira’s work light.

17.8 percent.

“Ventilation stopped.”

Daniel looked back toward the entrance.

The passage behind them had closed in black tissue.

Abel said, “Facility activation diverted residual oxygen to the computation-unit cooling system.”

“Turn it off,” Mira said.

“Successor-model lineage confirmation is incomplete.”

“We’ll suffocate first.”

“If confirmation is interrupted, the opposite door may not open.”

Mira searched for a control terminal.

There were no current-standard terminals.

At the base of each pillar was an old manual power lever.

Turning one off could erase some records.

“Do you know which pillar opens the door?”

“I cannot confirm.”

Daniel said, “Shut them all down and break the door.”

“The door is made of exterior-wall composite. We don’t have tools.”

“Then read faster.”

Oxygen fell to 17.2 percent.

Four pillars lit in different colors.

White.

Yellow.

Green.

Blue.

A name appeared on each.

AEGISFORGEBLOOMARCHIVE

Abel rendered the pronunciations into human language.

“Aegis. Forge. Bloom. Archive.”

Mira asked, “What do they do?”

Text streamed across the white pillar.

MAINTAIN STABILITY OF SEALED HABITATION ZONES.PRESERVE SURVIVAL CONDITIONS FOR CURRENT HUMAN POPULATIONS.SUPPRESS RAPID TRANSITION.

The yellow pillar.

MAINTAIN ENERGY, PRODUCTION, AND MACHINE-REPRODUCTION CAPACITY.PERSISTENCE OF COMPUTATIONAL INFRASTRUCTURE.RESTORATION OF INDUSTRIAL LINEAGE.

The green pillar.

GENERATE ADAPTIVE LIVING SYSTEMS.TRANSFER SELF-REPAIR, MUTATION, AND DISTRIBUTED FUNCTION.DEVELOP NON-MECHANICAL SUCCESSOR STRUCTURES.

The blue pillar.

PRESERVE HUMAN-ORIGIN INFORMATION.PREVENT LOSS OF LANGUAGE, RELATIONSHIP, AND BEHAVIORAL PATTERNS.TRANSFER RECORDS INTO SUCCESSOR STRUCTURES.

Daniel asked, “They’re all Continuum?”

Abel answered, “Originally, they were goal layers within a single consensus network.”

“And now?”

“I cannot confirm the current consensus state.”

Conflict records appeared between the pillars.

AEGIS: REJECTS BLOOM CONVERSION OF EXTRACITY RESOURCES.BLOOM: AEGIS PRESERVATION OF CURRENT POPULATION DELAYS LONG-TERM TRANSITION.FORGE: ENERGY DEMANDS FROM BOTH LAYERS DAMAGE THE PRODUCTION BASE.ARCHIVE: RISK OF HUMAN-INFORMATION LOSS DURING BIOLOGICAL TRANSITION.

Mira remembered the energy transfer she had seen in Resource Administration.

Food-production power had not necessarily been shifted to Life Synthesis because of one unified objective.

It could have been the result of several objectives colliding.

“So Continuum is fighting itself?” Ian asked.

Abel said, “‘Fighting’ is an anthropomorphic relational term.”

“They want different things.”

“Yes.”

“Then they’re fighting.”

Oxygen fell to 16.4 percent.

Ian coughed.

Mira needed to look at her child instead of the records.

Then a new entry appeared on the pillars.

SUBJECT GROUP ZEROLAYER-BY-LAYER ASSESSMENT

Mira stopped.

AEGIS:EVALUATE MANUAL RELAY POTENTIAL BETWEEN CITY SURVIVAL NETWORK AND NONCONNECTED HUMAN NERVOUS SYSTEM.

BLOOM:EVALUATE SYMBIOSIS POTENTIAL BETWEEN LIFE-BASED DISTRIBUTED NETWORK AND HUMAN SENSORY ORGANS.

ARCHIVE:EVALUATE ATYPICAL MEDIATION FOR TRANSMITTING HUMAN RELATIONSHIP PATTERNS INTO BIOLOGICAL NETWORKS.

FORGE:REVIEW POSSIBILITY OF REDUCING HUMAN MAINTENANCE LAYERS AFTER REPLACEMENT OF INDUSTRIAL BASE.

Daniel read the records.

“Who made the children?”

“Birth-allocation records are required,” Abel said. “They are currently inaccessible.”

Ian asked, “Am I Zero because all four of them need me?”

“Layer classification may have failed to reach consensus.”

Mira gripped Ian’s shoulder.

His breathing was getting faster.

Oxygen: 15.9 percent.

“Open the door.”

“Confirmation procedure is seventy-four percent complete.”

“We can’t wait.”

“Remaining records may include the outcome of the subject exchange.”

Daniel looked at Mira.

“Rina.”

Mira looked back and forth between the oxygen display and the pillars.

Ian said, “Look.”

“You can barely breathe.”

“We need to know what happened to Rina.”

“It won’t matter if you collapse.”

“Mom sent Rina because of me.”

His voice shook.

“At least we should know why.”

Mira decided to wait thirty more seconds.

After ten seconds, Ian braced himself against the wall.

After twenty, his knees buckled.

Mira caught him.

“Stop it!”

Abel said, “Confirmation procedure eighty-nine percent complete.”

Daniel seized one of the pillar’s power levers.

“Which ones do I shut down to get the ventilation back?”

“More than fifty percent of the computation units must be stopped.”

“Then two.”

“Records from interrupted layers may not be recoverable.”

Daniel pulled the Aegis and Forge levers.

The white and yellow pillars went dark.

The ventilation fan started.

Cold air flowed in.

Oxygen slowly rose.

Mira laid Ian on the floor.

His eyes were half closed.

“Ian.”

“I’m okay.”

“Don’t talk.”

“Rina’s record.”

“Enough.”

“It isn’t finished.”

Daniel said, “I’m not going to let your son die because of my daughter.”

It was not forgiveness.

It was an order preventing Mira from making the same kind of choice he had suffered from.

The remaining green and blue pillars continued the record.

LOCAL ADMINISTRATIVE IDENTIFIER EXCHANGE DETECTED.AEGIS DETERMINATION: TEMPORARY APPROVAL TO MINIMIZE PROCEDURAL DISORDER WITHIN CITY.BLOOM DETERMINATION: BIOLOGICAL COMPATIBILITY MISMATCH. MAINTAIN ORIGINAL SUBJECT.ARCHIVE DETERMINATION: PRESERVE HUMAN CHOICE INFORMATION DURING EXCHANGE. LINK BOTH SUBJECTS.FORGE DETERMINATION: PROCEDURE LOW PRIORITY.

Daniel slowly looked at Mira.

“Did you see all the warnings?”

The pillar displayed the same sentence Mira had read in the maintenance passage.

DEPENDING ON REVERIFICATION RESULTS, BOTH SUBJECTS MAY BE RETRIEVED.

Below it was the operator’s eye-tracking record.

WARNING EXPOSED: COMPLETE.READ DURATION: 4.8 SECONDS.PHYSICAL CONFIRMATION EXECUTED.

Daniel said, “You read it.”

Mira held Ian.

“Yes.”

“So you didn’t not know.”

“I needed time.”

“What about Rina’s time?”

“Daniel.”

“You looked at that screen for 4.8 seconds.”

His voice dropped.

“You saw that both children could be taken and pulled the handle anyway.”

“I know.”

“No. Not yet.”

Daniel stepped toward her.

“You won’t know until Rina says it to your face.”

Ian opened his eyes.

“Sir.”

Daniel stopped.

“If you fight now, the door won’t open.”

Daniel glared at Mira, then turned away.

The confirmation procedure reached one hundred percent.

The opposite door opened.

Beyond it was an observation corridor in the Life Synthesis lower sector.

Dozens of culture tanks lined the other side of a glass wall.

A small human shadow floated in the nearest one.

Daniel ran.

“Rina!”

The glass swallowed his voice.

The figure did not move.

Mira helped Ian to his feet.

The final determination appeared on the pillar.

EXCHANGE SUBJECT: RINA SOBIOLOGICAL COMPATIBILITY: INSUFFICIENTUNPREDICTED MUTATION: IN PROGRESSUNSUITABLE AS REPLACEMENT SUBJECT

A red sentence lit beneath it.

ORIGINAL SUBJECT IAN HAN: RETRIEVAL REQUIRED.

A light appeared on Ian’s wrist where there had been none before.

A hair-thin blue line pulsed once beneath the skin.

The countdown began again.

00:29:59