While attending a party thrown by one of their English professors, six college students use a Ouija board to contact a spirit that identifies itself only as 'Butler'. Butler promises the six a treasure if they will go to a remote mountain location called Calamity Peak. The professor, who knows from experience that messing around with the supernatural can be dangerous, attempts to dissuade them, but the kids steal the board and set off for the mountain anyway. Once they arrive they are menaced by a machete-wielding killer, and soon begin to wonder if Butler might be trying to harm them.