Innocent people are brutally killed on the streets of New York by a uniformed police officer. A young cop, Jack Forrest (played by Bruce Campbell), finds himself marked as the chief suspect after his wife is murdered. As Lieutenant Frank McCrae (Tom Atkins) investigates these mysterious killings, the death toll rises and he suspects a mysterious police cover-up. This "maniac" cop must be stopped, but it might not be so easy! He isn't an ordinary man. He's inhuman... driven by supernatural forces and ready to take on the entire police force, hell-bent on revenge!

When a series of brutal murders are said to be committed by a cop, the populace panics.