Samantha Gray (Lynne Frederick) witnessed as a child how a man named Haskin (Jack Watson) killed her mother. Meanwhile, she has grown up and marries industrialist Alan Falconer (John Leyton). But at the wedding, she sees Haskin again, whom she suspected in prison. In the following period, she feels increasingly pursued by the man and her friend Beth (Stephanie Beacham) cannot help her. After all, there are even a series of murders and Samantha no longer knows if she is insane or not...