It turned with a soft click. I stepped inside and immediately the smell hit me—damp concrete, bleach, and something medicinal.

I crept down the wooden stairs into the basement. The fluorescent lights buzzed overhead. My eyes adjusted, and what I saw made me stop breathing.

Lucas was lying on the cold floor in nothing but a thin T-shirt and boxer shorts. His right leg was grotesquely swollen, the knee a misshapen purple mass. A heavy industrial chain was wrapped around his left ankle and padlocked to a concrete support pillar. His arms were littered with fresh needle marks.