The Tseng family is one of the most noble and respected clans in a small village in Tibet. The patriarch of the Tseng family wants to marry off his daughter Ching Lan into the Kao clan. However, the cunning and deceitful eldest brother Kao Chu only wants his younger sibling Kao I-Fan to marry Lan so he can gain access to the Tseng family's considerable wealth and power.

An Australian cop heads to Hong Kong to head off the supply of a new designer drug which raises the sexual appetite of anyone who takes it.