A young man tries to help a teenage European girl whom escaped from a clinic hospital after witnessing the murder of her parents by a serial killer and they try to find the killer before the killer finds them. An anorexic young woman escapes from a psychiatric clinic and meets a young man who wants to help. She is caught and returned to her parents, who are soon beheaded by a garrotting stranger making the rounds about town, apparently striking only when it rains. The orphaned young woman and her new lover launch their own investigation and are endangered when a link is discovered with the victims and a particular operation performed years before.