Graham Harris is a gifted clairvoyant, and during a television interview, he 'sees' a murder being committed. He knows that the killer is the man the police have named the Butcher - the slayer of nine young women.

Learning of the psychic identification, the Butcher begins to stalk this 'witness' to his crime, and traps Harris and his girlfriend at night in a vast forty-two-storey business building, hunting them relentlessly from floor to floor...