 Inspector Michael Wong (Simon Yam), alongside Shirley Ho (Carol Cheng), Brother Lung (Bryan Leung), Fan Chun-yau (Jacky Cheung), Uncle Tat (Ng Man-tat) and Terry (Donnie Yen) are all part of the Anti-Drug Unit of the Royal Hong Kong Police Force.The relationship between them are like brothers in general.During an operation, they worked together to bust a drug den but the chief drug trafficker, Swatow Hung (Wang Lung-wei), escaped.