A graduate student discovers her nightmares are actually visions of real-life murders committed by a man known as the Clock Killer. Joined by an unbelieving detective, she decides she must stop the killer herself, or become his next victim.

Sarah Taylor, a police psychologist, meets a mysterious and seductive young man, Tony Ramirez, and falls in love with him. As a cause of this relationship, she changes her personality when she begins to receive anonymous telephone calls.