Overview
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.
Trailer
Crew
Cast
Andy Lau
Lau Kin Ming
Tony Leung Chiu-wai
Chan Wing Yan
Anthony Wong Chau-Sang
Wong Chi Shing
Eric Tsang Chi-Wai
Hon Sam
Kelly Chen Hui-Lin
Lee Sum Yee
Sammi Cheng Sau-Man
Mary
Elva Hsiao
May
Chapman To Man-Chat
Silly Keung
Gordon Lam Ka-Tung
Inspector B
Shawn Yue Man-Lok
Young Chan Wing Yan
Edison Chen
Young Lau Kin Ming
Berg Ng Ting-Yip
Senior Inspector Cheung
Wan Chi-Keung
Officer Leung
Dion Lam
Del Piero
Tony Ho
Suspect
Courtney Wu
Stereo Shop Owner
Hui Kam Fung
Cadet School Principal Yip
Chaucharew Wichai
Paul
Au Hin-Wai
Elephant
Lee Tin-Cheung
Double 8
Part of Infernal Affairs Collection
More like this
Keywords
undercover agentundercoverhong kong
Details
Budget
$6M
Revenue
$9M
TMDb Votes
1,854
Added May 15, 2026Updated Jun 4, 2026