You bolt up the stairs, hoping to find something to defend yourself with. Instead, you're met with a horrifying scene. The old mattress on the floor is not the only evidence of recent life. You can also see jars of amber colored liquid against the wall, and clear piles of excrement in one corner. Someone has been living up here. Then you see the heavy chain. Someone has been kept up here. Then you hear the door slam shut behind you, and the unmistakable sound of a deadlock turning. 
Turning to look, you can only see the reflection of the lone window in the excited eyes and distended teeth of the attic's inhabitant before they strike. 

​Then, nothing.