Chan Wing Yan, a young police officer, has been sent undercover as a mole in the local mafia. Lau Kin Ming, a young mafia member, infiltrates the police force. Years later, their older counterparts, Chen Wing Yan and Inspector Lau Kin Ming, respectively, race against time to expose the mole within their midst.

Genres

Cast

Andy Lau

刘健明

Tony Leung Chiu-wai

陈永仁

Anthony Wong Chau-Sang

黄志诚

Eric Tsang Chi-Wai

韩琛

Kelly Chen Hui-Lin

李心儿

Sammi Cheng Sau-Man

Mary

Elva Hsiao

May

Chapman To Man-Chat

傻强

Gordon Lam Ka-Tung

大B

Shawn Yue Man-Lok

少年陈永仁

Edison Chen

少年刘健明

Berg Ng Ting-Yip

张Sir