Triad gangster turned corrupt cop Lau Kin-ming goes to dangerous lengths to avoid detection.

Tony Leung Chiu-waias Chan Wing-yan
Andy Lauas Senior Inspector Lau Kin-ming
Leon Lai Mingas Superintendent Yeung Kam-wing
Chen Daomingas Shadow Shen Cheng
Anthony Wong Chau-Sangas Superintendent Wong Chi-shing
Eric Tsangas Hon Sam
Kelly Chen Hui-Linas Dr. Lee Sum-yee
Sammi Cheng Sau-Manas Mary
Carina Lauas Mary Hon
Edison Chenas Young Lau Kin-ming
Andrew Lau Wai-Keung