A long, high wailing sound cut through the tension in the air. I didn’t dare take my eyes from Popescu, but he turned and stared down the long, winding drive. The sound rose and dropped steadily and grew more distinct by the second.

“It’s a siren,” I said softly.

There weren’t many other houses this deep in the woods. I held my breath as I listened a few seconds longer. The sound was definitely growing louder. I turned to Tahir in a panic. “It’s a ...