“I found your first thread when I was twenty-eight.

I’ve been building this room around you for a very long time.

I let you think I was distracted.

I let Nathan think he’d broken me.

I let you both walk all the way inside.” The tablet on the table chimed, and its screen filled with small live windows — members of the firm’s board, federal investigators, and a seal I watched Charles recognize with the last of the color in his face.

“It’s been transmitting since the moment I touched it,” I said.