Suen Man Kwong (Alex Man), an illegal hawker who sells fish balls for living, dodges inside an alley in order to escape the arrest. He encounters Dick , a probationary inspector, who is arresting a resisted hijacker. The arrest causes a pregnant woman's life. Dick purposely framed Suen for manslaughter to cover up his mistake. Suen has sentenced for 3 years jail time. After released from prison, Suen discovers that his girlfriend has left and sold the roof unit to Chi (Rosamund Kwan). He ends up moving into Tit (Dicky Cheung), his stepbrother, and Tan's home, his girlfriend, that is next door. When Suen's family celebrates Chi's birthday, Dick shows up. In fact, he is Chi's boyfriend. An awkward moment for the party! Suen later saves Chi from Dick's sexual assault and punches him in return. Dick rapes Tan, a part-time call girl, for revenge. Unable to accuse Dick for rape that piles up their hatred. Right when Suen punches the pimp while he is disturbing Tan, a gang is dashing out with knifes, kills the pimp unmercifully. Suen is holding a knife when the police reach the scene. Once again, Dick frames Suen for manslaughter! Dick makes use of his authority to abuse Suen whom ends up killing Dick's cousin subordinate and flees with a gun. Dick is in rage and stomps off to the roof unit. He kills Tit and Tan by mistake when he is interrogating Suen's whereabouts. And the house is in flames. Dick realizes that Chi sees everything, decides to kill this only witness...