 A top secret experiment goes awry as CIA agent Harry is accidentally bitten by a man who became a zombie from a vaccine that was supposed to make him intolerable to pain. When Harry returns to Hong Kong, he begins to undergo a transformation and becomes a zombie. He is arrested by police officer Marco for getting involved in a gang fight. In jail, Harry turns all the prisoners into his zombie horde. Soon, the police precient becomes a house of the dead. It s up to Marco, Harry s ex-girlfriend Bell, and Triad member Cheap to stop the horde before it s too late.