Chen Chun (Max Mok) and San (Roy Cheung) are two low-level mainland gangsters who open their own gambling outfit. When Chen Chun winds up killing the owner of a rival parlor, he flees to Hong Kong where he soon falls in with a heroin-addicted hooker named Fang (Lee Suet Man). They inevitably fall in love, but soon their bliss is shattered with the news that Chen's gambling venture has been taken over by a notorious gangster called Bolo Guy (Jimmy Lung Fong) and his mainland girlfriend Melia (Jacqueline Ng) who has been killed. Chen goes back over the border looking to set things right.

After having been sexually aroused and then humiliated by a woman who was breast-feeding her baby while he was a child, a young man named Chen Siu-hsiong (Lawrence Ng) will go on a wild murder spree where he will kill every woman that he see breast-feeding her child in public.

During a particularly long haul, truck-driver Wah has an encounter with a prostitute. Wah faces the consequences of his infidelity as he learns that he has contracted the HIV virus and infects infant child.