MY 6-YEAR-OLD HEARD A WOMAN CRYING UNDER OUR MARBLE FLOOR—WHEN WE SMASHED IT OPEN, WHAT WE FOUND FROZE MY BLOOD!

"Lily!" I shouted, taking a step onto the marble.

"Stop right there, Daniel," a voice commanded from the shadows of the second-floor gallery.

I looked up. Standing behind the carved balustrade, bathed in the faint green glow from below, stood the man I had called Thomas. But he wasn't hunched over with arthritis anymore. He stood tall, dressed in a sharp tweed suit, his white hair combed back, his eyes gleaming with cold, manic intelligence. In his right hand, he held a heavy remote detonator. In his left, a hunting rifle rested casually across his forearm.

"Don't move another inch, or I trigger the pneumatic seals," Julian Vance said calmly. "The blast doors will sever the joists, and that entire section of the foyer will collapse thirty feet into the sub-basement. With your daughter on it."

Lily looked back at me, tears streaming down her pale cheeks. She was holding the wooden horse—the one he had carved for her. "Daddy, please don't let him take me."

"Vance, let her go!" Miller shouted, raising his Glock, tracking the old man across the upper landing. "It’s over! The state police are three minutes out. You have nowhere to run!"

Vance chuckled—a dry, rasping sound that echoed through the hidden conduits in the walls, multiplying until it sounded like a dozen men laughing from every corner of the house.

"Run? Why would I run from my own masterwork?" Vance leaned over the railing, looking down at the house with twisted pride. "For twenty years, I studied the fracture points of human psychology. I watched families tear themselves apart within these walls. I watched grief rot you from the inside out after Sarah died, Daniel. I listened to your prayers. I recorded your weeping."

"You sick, twisted son of a bitch," I hissed through clenched teeth.

"You were fascinating, Daniel," Vance continued, ignoring my rage. "Most subjects break within three years. They develop paranoia, insomnia, auditory hallucinations from the infrasound pipes I installed in the vents. But you... you endured. You poured all your resilience into that child."

He pointed the barrel of the rifle toward Lily.

"And then she heard Clara. An acoustic anomaly. A child’s hearing operates at frequencies adults tune out. She spoiled the isolation." Vance sighed, shaking his head with genuine regret. "And when an experiment is contaminated, the scientist must sterilize the petri dish."

Suddenly, a loud crash echoed from the rear of the foyer.

The glass doors of the conservatory shattered. A silhouette charged through the darkness, moving with violent, desperate speed.

It was Clara.

She had escaped the hospital. Still wearing her patient gown, wrapped in an oversized trench coat, her hands bandaged, she held a heavy steel crowbar she must have grabbed from the fire engine outside.

"Julian!" she screamed, her voice cracking with fury.

Vance spun around toward the balcony, startled by the intrusion. In that split second of distraction, Miller fired.

The gunshot was deafening within the enclosed foyer. The bullet struck the wooden railing right next to Vance’s hip, sending splinters exploding into the air. Vance staggered backward, firing his rifle blindly into the ceiling, the muzzle flash illuminating the terrifying labyrinth of overhead mirrors installed in the chandelier mount.