The door was open. I stared at it. Every sensible part of me said to walk away. Unfortunately, curiosity had never been one of my sensible parts. I stepped inside. The hallway was darker than usual. Dust floated through the thin light coming from the windows. I took another step. Nothing happened. No voice. No footsteps. No strange feeling. Just silence. I let out a breath. Maybe I had imagined everything. Then I noticed the floor. Footprints. Fresh ones. Someone had walked through here recently. I followed them. They led past the old classrooms and stopped in front of a wooden door. I tried the handle. Locked. Of course. I looked around. Nothing. Then I noticed something beneath the door. A thin strip of paper. I crouched and pulled it toward me. There was one

