The private wing assigned to Marcus and Mason was an exercise in sterile luxury.

I walked out of the bedroom and stopped directly beneath the air register in the hallway. I pointed upward to the shiny stainless steel screws.

"This mansion was constructed four years ago," I said, looking up at Nathan. "All the fixtures use dark brass hardware. Every single vent cover in the main foyer and your office has painted screws matching the trim. But this wing—the wing where your sons have been confined for eight months—has brand-new, machine-cut steel screws. They’ve been removed and replaced repeatedly."

Ashford let out a sharp, mocking laugh. "Screws? You are basing a medical accusation on maintenance hardware? The HVAC team replaced the housing when we installed the HEPA filtration units!"

"If they installed HEPA filtration units," I replied, "the air in this hallway would smell like nothing. But it doesn't. It smells like synthetic benzaldehyde. The same scent sitting in those glass bottles on the boys' nightstand."

Nathan looked up at the vent, then turned his gaze to Gerald. "Bring me a screwdriver."

"Mr. Coleman, this is absurd!" Ashford insisted, stepping between Nathan and the wall. "I will not have my medical integrity questioned by a woman with no medical degree! If you allow this disrespect to continue, I will resign from this case immediately, and you can find another specialist to explain why your sons stop breathing!"

Nathan didn't blink. He reached out, grabbed Ashford by the lapel of his tailored coat, and shoved him back three paces until the doctor bumped hard against the opposite wall.

"Gerald," Nathan said, his voice terrifyingly calm. "The screwdriver."

Gerald left and returned in less than twenty seconds, holding a heavy yellow-handled tool. Nathan took it, stepped onto a plush velvet bench beneath the vent, and unbolted the four screws in swift, practiced movements. He pulled the metal grate away from the wall.

Inside the duct sat a small, black plastic housing—an aftermarket electronic atomizer wired directly into the estate’s secondary power circuit. A tiny green light pulsed silently on its side, emitting a faint, steady mist into the air stream entering the boys' wing.

Nathan reached in and yanked the device free, severing the thin copper wires. Sparks hissed and died against the metal ducting. He jumped down off the bench, holding the black box in his palm like a unexploded grenade.

He turned to Ashford. "What is this?"

Ashford’s face had lost all color. "It’s... it’s an aerosolized bronchodilator. To assist their breathing while they sleep."

"Without my consent?" Nathan asked. "Without a record in their medical file?"

"It’s a experimental trial protocol!" Ashford stammered, backing toward the corridor leading to the main entrance. "It requires strict confidentiality to protect the patent rights of the medical research firm!"

"Which firm?" I asked, stepping beside Nathan. "The firm registered in the Cayman Islands that received a four-hundred-thousand-dollar transfer from your personal account last month?"

Ashford froze. His eyes darted to me, filled with sudden, feral hatred. "How do you know that?"

"I don't," I said simply. "But your reaction just confirmed it."

Nathan didn't waste another second. He raised his hand, and two large men in dark suits appeared from the end of the hall like shadows taking form.

"Lock him in the wine cellar," Nathan ordered, his voice dripping with ice. "Take his phone. Take his keys. If he speaks, hit him."

"Coleman, you can't do this!" Ashford yelled as the security team seized his arms, dragging him backward down the marble corridor. "You're a criminal! I'll go to the federal authorities!"

"I am the authority in this house," Nathan said quietly.

When the doctor’s screams faded into the distance, Nathan looked down at the black device in his hand, then turned his eyes to me. The exhaustion that had previously blanketed his features was gone, replaced by something far more dangerous: clarity.