Six young friends fly off on a weekend's camping trip when engine trouble forces them down on a remote American Island. They explore and find a strange house occupied by an even stranger family. MA (Yvonne De Carlo), PA (Rod Steiger) and their three middle-aged children, still living in the past of 1920 backwoods America. To their relief the group of friends are given shelter and welcomed with apple pie and bible reading. This remote idyll rapidly becomes the stuff of nightmares as one by one the young friends die macabre and horrible deaths. Eventually only CYNTHIA (Sarah Torgov) is left alive, and the secret of the Island is revealed. But Cynthia too has a past, and the horrors she experiences on the Island are enough to snap her already fragile hold on reality. She renders a terrible revenge on the killing family and finds herself the sole survivor of the Island of death. Now she waits for the next innocent visitor.