A rowdy rock group are accompanied by a film crew to desolate Lake Infinity to produce a music video. One night the musicians visit the local pub while the various members of the film crew satisfy their carnal desires with one another aboard the luxurious houseboat they are all staying in. They are so busy they fail to notice that a rampaging lunatic has snuck aboard the boat, and one by one the various characters are brutally slaughtered in a variety of grisly ways.

The horrors of World War I have robbed returning veteran Chris Baldry of his memory. The traumatized soldier doesn't even recognize his own wife, Kitty, or remember their years together. While Baldry attempts to cope with the unfamiliar surroundings of his own home, he seeks out the company of an old flame from his childhood, Margaret Grey. His amnesia also makes him a ready target for the affections of his older cousin, Jenny.