Craig Manning (Michael Moriarty) is a respected doctor living in the United States, who begins to experience strange visions of women being murdered. Before long, he begins to suspect that these visions are the result of a psychic connection with his twin brother Keith (also Michael Moriarty), who supposedly died in a house fire in Cleveland at the age of 17, but who is now engaged in a murder spree. Recognizing the scenery in one of the visions, Craig travels to Hamburg, Germany to find and stop his brother, over the protests of his girlfriend Julie Warren (Penelope Milford).