In Brian DePalma's terrifying horror/thriller, an elaborate game of mind control begins when the son (Andrew Stevens) of a government agent (Kirk Douglas) is kidnapped for his psychokinetic powers. Desperate to find him, the father hires a girl (Amy Irving) with similar psychic abilities. She soon reveals that his son is a prisoner at a secret U.S. agency where he's being used for dangerous mind experiments and programmed for elimination.