While on their honeymoon, Joe and Madeline Drake get into an accident that leaves him with a bad leg and her with painful headaches. Later, Joe discovers that Madeline's old boyfriend Ralph Morrow sent her an expensive wedding present. When Ralph shows up at their house, Joe becomes paranoid. He is worried that Ralph is responsible for a number of butcher knife murders that have been occurring in their neighborhood. Joe goes to search for his wife, as does Ralph. Meanwhile, Madeline is walking home. She hears someone behind her. She ducks into an alley, but is followed. Joe arrives on the scene only to discover Madeline standing over Ralph's bloody corpse. She confesses to her husband that she though someone was following her and killed Ralph to protect herself. She then admits that it has happened three times before when her headaches struck.