A police inspector becomes obsessed with apprehending a criminal planning a major heist at the Hong Kong Jockey Club in the weeks leading up to Hong Kong's return to China.

Private detective Calvin is hired to tape the sex life of a female politician Kwai Fung Ming, but falls for her instead. He decides to help her counter-attack Law Sau Nam, who is the mastermind to discredit Kwai. Unexpectedly, Law is only one of the tools in this war.