Sarah kept staring at her hands.
The sensation passed quickly.
Too quickly.
One second of absolute unfamiliarity.
Then normal again.
But not fully normal.
Because now she knew what it felt like for reality to slip sideways.
And once that happened once, the mind never completely trusted itself again.
House noticed immediately.
Of course he did.
"You hesitated," he said quietly.
Foreman looked between them. "Hesitated about what?"
Sarah lowered her hands slowly. "Nothing."
House tilted his head slightly.
Wrong answer.
She saw it in his eyes.
Not accusation.
Evaluation.
He was measuring cognitive delay, emotional masking, behavioral instability. The same way he observed every patient who lied to him.
Except this time—
She wasn't sure she was lying.
The isolation room had gone completely silent now. The corpse remained motionless on the bed while disconnected monitors emitted occasional bursts of static. Cameron stood near the doorway looking pale, visibly resisting the urge to leave entirely.
Chase finally exhaled sharply. "Okay. Somebody explain what we just saw because I'm reaching the limit of my tolerance for haunted MRI machines."
House stood slowly with the help of his cane.
"Dead guy uploads fragmented identity residue into emotionally receptive nurse through synchronization-based cognitive architecture."
A pause.
"Basic Tuesday."
Foreman glared at him. "You don't actually believe that."
House looked genuinely surprised.
"You saw the corpse sit up."
"That doesn't mean—"
"The monitor generated text without network input," House interrupted. "The patient displayed postmortem electrical activity after confirmed biological death. Sarah experienced externally verifiable memory intrusion during synchronized neural resonance."
Foreman crossed his arms tightly. "Or she had a psychological episode under stress."
House looked at him flatly.
"Sure. And the dead guy joined in for morale support."
Silence.
Nobody had a satisfying explanation anymore.
That was the real problem.
Medicine functioned because impossible things eventually became explainable things.
But this—
This felt different.
Not impossible.
Wrong.
Sarah slowly stood up, though the floor still felt unstable beneath her feet.
Her headache remained.
Not sharp anymore.
Diffuse.
Like pressure hidden behind thought itself.
Cameron approached her carefully. "You should sit down."
"I'm fine."
"You're shaking."
Sarah looked down.
Cameron was right.
Tiny tremors moved through her fingers intermittently.
Neurological.
Not emotional.
House noticed too.
"Any auditory hallucinations?"
Sarah frowned immediately. "No."
"Visual distortions?"
"No."
"Derealization?"
A pause.
"…Maybe."
Foreman sighed tiredly. "Great."
House ignored him completely.
"When?"
Sarah hesitated.
Then answered honestly.
"Sometimes the room feels slightly delayed."
Nobody liked that answer.
Especially House.
She saw the shift immediately.
Because House didn't fear weirdness.
He feared patterns.
And this was becoming one.
Chase moved toward the dead patient cautiously. "Shouldn't we notify someone?"
House blinked. "About what?"
"That!"
House glanced toward the corpse.
"Patient died after severe neurological instability. We attempted resuscitation. Failed."
Chase stared at him. "That's not remotely the whole story."
"Fortunately hospitals love incomplete paperwork."
Foreman rubbed his face tiredly. "House…"
"No," House said calmly. "Think this through. We report unexplained postmortem cognition and suddenly Princeton-Plainsboro becomes the world headquarters for schizophrenic conspiracy theorists."
Cameron folded her arms. "So we hide it?"
"We survive it."
Sarah looked at the corpse again.
Something about it bothered her now.
Not fear.
Absence.
The room had changed after the defibrillation.
Before, the atmosphere felt crowded somehow. Pressurized. Like invisible attention lingered everywhere simultaneously.
Now—
It felt empty.
Completely empty.
She frowned slowly.
House noticed instantly.
"What?"
Sarah looked uncertain. "It's gone."
"What is?"
She struggled to explain it.
"The feeling."
House's expression remained unreadable.
But interested.
Dangerously interested.
Before he could ask another question, the lights flickered again.
Everyone froze immediately.
But this time nothing dramatic happened.
No moving corpse.
No distorted reflections.
Only a brief pulse through the monitors.
Then silence.
Foreman exhaled slowly. "Electrical instability."
"No," Sarah whispered.
Everybody looked at her.
Her eyes remained fixed on the dark monitor screen beside the bed.
"I heard something."
House stepped closer immediately. "What?"
Sarah frowned harder.
Trying to process it.
"It sounded like…"
Her throat tightened slightly.
"…breathing."
Nobody spoke.
Then Cameron said what all of them were thinking.
"There's nobody else here."
Sarah wished that helped.
House limped toward the monitor carefully.
He studied the black screen for several seconds.
Then tapped it once with his cane.
Nothing.
Another tap.
Static flashed briefly across the glass.
And for less than a second—
A face appeared.
Not the patient.
Someone else.
A woman.
Terrified.
Then gone.
Cameron stepped backward immediately. "Did you see that?!"
"Yes," Chase answered instantly.
Foreman swore under his breath.
House stared at the dark monitor with terrifying focus now.
Not fear.
Obsession.
Sarah recognized the look.
It was the same expression he got during impossible diagnoses.
The moment when mystery became irresistible.
And that realization frightened her almost as much as the phenomenon itself.
Because Gregory House would not let this go.
Ever.
The isolation wing doors suddenly burst open.
Wilson entered quickly, slightly out of breath.
"I got your message—"
He stopped.
The atmosphere hit him immediately.
The dead body.
The shattered equipment.
The expressions on everyone's faces.
Wilson looked directly at House.
"…What happened?"
House answered instantly.
"Science."
Wilson stared at him for three seconds.
"Okay. Real answer."
House pointed casually toward Sarah.
"She may be developing synchronized identity fragmentation from residual postmortem neural transfer."
Wilson closed his eyes briefly.
"Every time I think you've finally broken reality, you somehow exceed expectations."
Sarah almost laughed.
Almost.
But exhaustion crushed the impulse before it fully formed.
Wilson approached her more gently than the others had.
"How are you feeling?"
That simple question nearly broke her.
Because nobody else had asked it like a human being.
Only medically.
Only analytically.
Sarah swallowed carefully. "I don't know."
Wilson nodded slowly.
Fair answer.
House moved toward the observation window, thinking rapidly now.
"You said the room felt empty afterward."
Sarah looked toward him. "Yeah."
"And before that?"
"It felt…" She searched for the right word. "Occupied."
House nodded once.
Like confirmation.
Foreman noticed immediately. "You have a theory."
"I always have a theory."
"That doesn't answer the question."
House ignored him.
He stared through the glass into the dark hallway beyond the isolation wing.
Then:
"What if synchronization wasn't transmission?"
Silence.
Wilson frowned slightly. "Then what was it?"
House turned back toward them slowly.
"Accumulation."
Nobody spoke.
Because they already hated where this was going.
House continued anyway.
"The patient described residual identities from previous observers. Thirty-one failed synchronization attempts." He pointed toward Sarah. "Then she establishes primary compatibility and suddenly the system stabilizes for the first time."
Cameron looked uneasy. "You think she absorbed them?"
"Not absorbed." House corrected. "Integrated."
Sarah felt cold instantly.
"No."
House looked directly at her.
"You're hearing things they heard. Seeing things they saw. Experiencing cognitive bleed from identities that shouldn't exist anymore."
Wilson folded his arms. "That still doesn't explain the mechanism."
House smirked faintly.
"Oh good. I was worried the impossible thing lacked proper documentation."
Sarah pressed fingers against her temple again.
Another flash hit her instantly.
A hallway.
Rain outside hospital windows.
Someone whispering repeatedly:
Don't fall asleep.
Then another voice:
They stay longer when you sleep.
Sarah staggered hard.
Wilson caught her this time.
"Sarah?"
Her breathing accelerated sharply.
"They're still here."
The room went silent again.
House stepped closer immediately.
"What do you mean still here?"
She looked terrified now.
"I thought it stopped after the shock."
"Did it?"
Sarah's eyes darted toward the dark monitor.
"…No."
Static crackled softly from the disconnected speaker.
Everyone heard it.
Then—
Whispering.
Very faint.
Too distorted to understand clearly.
Cameron went pale.
"Tell me that's interference."
Nobody answered her.
Because it sounded too rhythmic.
Too intentional.
The whispering continued for several seconds before abruptly stopping.
Wilson looked at House carefully now.
"This is becoming dangerous."
House blinked once. "Becoming?"
Wilson ignored that.
"She needs neurological observation. Full psych evaluation too."
Sarah immediately shook her head. "No."
Wilson softened his tone. "Sarah—"
"If they isolate me," she whispered, "I'll hear them more clearly."
That sentence landed badly.
Very badly.
Foreman exchanged a look with Cameron instantly.
Psychosis.
They were thinking psychosis.
Sarah saw it happen.
And panic rose immediately.
"I'm not crazy."
House answered before anyone else could.
"I know."
Everybody looked at him.
Even Sarah.
House's expression remained coldly analytical.
But certain.
"Psychosis doesn't create externally verified system responses."
Foreman frowned. "House—"
"The monitors reacted independently. The corpse demonstrated coordinated postmortem movement. Multiple observers witnessed identical visual anomalies."
House pointed his cane toward Sarah.
"She's not inventing this."
Sarah hadn't realized how desperately she needed someone to say that.
The relief hurt almost physically.
Wilson studied House carefully.
"You believe her."
House looked annoyed.
"I believe evidence."
Which, for him, meant the same thing.
A sudden metallic bang echoed somewhere deeper in the diagnostic wing.
Everyone jumped.
The sound came again.
Closer this time.
Chase frowned. "Was that the MRI corridor?"
Foreman immediately moved toward the door.
"Security probably shut down the wing."
Then the lights flickered again.
Once.
Twice.
Three times.
And every monitor in the room abruptly turned back on simultaneously.
Not displaying medical data.
Only reflections.
Each screen showed the room from impossible angles.
Security camera perspectives that didn't exist.
Different corners.
Different positions.
Different moments.
In one monitor, Sarah was standing beside the bed.
In another, she was facing the wall.
In a third—
She was alone in the room.
Smiling.
House saw it immediately.
His expression hardened instantly.
"Don't look at the screens."
Too late.
Sarah had already seen herself smiling again.
The false version of her slowly raised one hand from inside the monitor.
And tapped the glass from the other side.
One.
Two.
Three times.
Every screen instantly went black.
The room fell into total darkness.
Then a voice whispered beside Sarah's ear.
Not through the speakers.
Not electronic.
Personal.
Intimate.
"You're opening."