The answer to Minh's question began before Lãnh Phong reached the archive room.
Lãnh Phong remembered fire.
Hạ Yên remembered sequence.
Batch 17 unstable.
Subject fever at forty-one degrees.
Cold-line reaction spreading to the left hand.
Union observer requesting increased output.
Huyền Tinh technician approving continuation.
Her own signature under the stabilizer notes.
That was the part memory never let her burn.
She had believed she was making medicine for damaged martial artists. A way to keep khí backlash from tearing nerves apart. A way to help people survive what old masters called fate and cowards called weakness.
The first proposal had sounded merciful.
Stabilization therapy for post-combat internal damage. Controlled amplification for patients whose meridians had collapsed under bad training. A bridge between old martial superstition and modern medical language.
Hạ Yên had been young enough to believe that naming cruelty clinically could keep it from becoming cruelty.
Then she learned that the lab wanted controllable survivors, not survival itself.
By the time she understood, people were already dead in her handwriting.
That was the part no apology could rearrange.
She had not ordered the worst procedures. She had not sold the boys. She had not built the hidden rooms.
But she had initialed forms because a senior researcher said the dosage deviation was within tolerance. She had written "monitor" beside symptoms that should have made her scream stop. She had wanted the work to be true so badly that she mistook doubt for immaturity.
When the alarm sounded, everyone ran toward exits while Hạ Yên ran toward the archive. If the files burned, the dead became rumors, and rumors were where powerful men buried bodies; bravery had little to do with it.
She copied what she could. Names. Batches. Seals. Payments. Reaction videos. One photograph of a Union elder whose face should not have been in the facility.
She did not copy everything.
That failure followed her too.
For years, she would remember the drawers she did not reach, the cabinet that jammed, the folder whose label burned before she could read it. Guilt did not only keep count of what a person did. It kept count of what a person failed to save.
Smoke took the room slowly at first, then all at once.
Her hands shook so badly the final drive slipped twice before she forced it into the case.
That was when the door broke.
Hạ Yên did not see a savior.
She saw destruction shaped like a young man.
Lãnh Phong had blood on his sleeve, ash in his hair, and eyes that had already decided the building deserved to die. He told her to leave the case. She refused. He called her insane. She called him in the way.
Neither of them was wrong.
That was the first honest thing between them.
Honesty did not make either of them gentle.
Lãnh Phong looked at the case and saw the lab refusing to die. Hạ Yên looked at Lãnh Phong and saw a man ready to burn proof because grief wanted a clean ending.
They both called it justice.
They both meant different corpses.
Outside, rain hit the burning clinic and turned the night white with steam. Hạ Yên fell to her knees and vomited smoke onto the pavement without letting go of the evidence.
Lãnh Phong asked for her name.
She gave it.
Then she said the sentence that would ruin every gentle thing he might have felt for her.
"I can fix it."
She did not mean only the lab. She meant the formula, the stabilizer, and proof that the dead had not only been consumed. If she could make one version that saved instead of owned, then maybe the files in the case would become testimony instead of evidence that she had helped sharpen a knife.
It was a childish hope dressed in adult research language.
She knew that.
She kept it anyway.
For months after, she woke with the taste of smoke in her mouth and the weight of the metal case beside her bed.
Lãnh Phong told her to destroy it.
She told him no.
That was where trust, if it had begun, also began failing.
Years later, in her office, Hạ Yên opened Dataset 05 and looked at Minh's surviving reaction again.
Subject retained identity after predatory surge.
Subject responded to emotional boundary.
Subject survived Huyền Tinh cold-line contact.
Her hand hovered over the keyboard.
She deleted the phrase subject failure from an old file.
Typed:
Unresolved testimony.
Then she whispered to the empty room:
"Just a little longer."
The dead did not answer.
That was why she kept working.
Silence became the shape of permission if she was tired enough.
On better nights, she knew it was not permission at all.
It was only silence.
Hạ Yên's workbench divided her guilt into labeled trays.
One held safer stabilizers. One held failed compounds. The locked tray held the original response data from the burned facility. She opened it only after midnight, when fatigue made bad decisions feel like honesty.
Thanh Lạp Ty had offered protection if she completed a version that could reduce lethal reactions and document every dose. Their investment could save future patients. It could also give a government-facing faction leverage over every group desperate for the treatment.
Lãnh Phong stood in the doorway. "Destroy it."
"And the next laboratory starts from the dangerous version."
"Finish it, and they start from yours."
Neither argument was false. That was why the choice kept surviving.
Hạ Yên placed a photograph of one dead subject beside Minh's latest chart. She did not use the dead to justify the living experiment. She used the living result to test whether her promise to the dead had become another excuse.
At sunrise, she moved the master dataset off the network and split the key into three parts. One remained with her. One went into a sealed legal deposit. The last she did not tell Lãnh Phong about.
She continued working, but no longer allowed herself to call completion freedom. It was only the point at which somebody else would decide what her guilt was worth.