A man recently released from a mental institute inherits a mansion after his wealthy parents die. After a series of disturbing events, he comes to believe it is haunted.

While being transported by two detectives in a car, the dangerous criminal Krug is rescued by his brother Francis and his girlfriend Sadie, and they brutally kill the detectives. Meanwhile Emma, her husband Dr. John and their seventeen year-old daughter Mari Collingwood head on vacation to their house nearby the lake. Mari borrows the family car to meet her friend Paige that is working in a store in the town. They befriend the teenager Justin in the store and he offers some marijuana to the...