An insane man is shot dead by two cops, Kung and Hsiao, after he refused to listen to them and stabbed a woman dead. After that, the two cops always meet strange things and Hsiao's girlfriend is also haunted too. In order to reduce the fear, the cops employ a Taoist to find out the problem. After several enchantments, the Taoist discovers the truth. As Hsiao's father was involved in some corruption that led to a death. Now the spirit of the victim has returned from Hell for revenge.