Detective Sergeant of Serious Crimes Unit, Jun (Donnie Yen) detests crime and his lifelong nemeses
are a Vietnamese gang of three brothers - Archer, Tony and Tiger. In order to further infiltrate
the gang and fight them from within, Jun has planted a mole, Wilson (Louis Koo),
who has managed to gain the complete trust of the gang. However, Wilson's dual role is exposed
and resulting battles leave him handicapped for life. The day before Tiger's trial, Archer turns up at the
hospital to wipe out their only witness, Wilson. Jun manages to kill Archer and protect Wilson but Wilson's girlfriend (Fan Bing Bing) is held hostage by the gang.

Cast
Donnie Yen ... Det. Sgt. Jun Ma
Louis Koo ... Wilson
Collin Chou ... Tony
Ray Lui ... Archer Sin (as Lui Leung Wai)
Bingbing Fan ... Julie (as Fan Bing Bing)
Kent Cheng ... Inspector Wong
Yu Xing ... Tiger (as Xing Yu)
Qing Xu ... Madam Lau (as Xu Qing)
Ben Lam ... Sam
Lan Law ... Madam Ma (as Law Lan)
Ping Ha ... Tony's Mum (as Ha Ping)
Irene Wang ... Cindy
Austin Wai ... Four Eyes
Wai Ai ... Hero (as Al Wai)
Chi Wai Wong ... Baldy (as Wong Chi Wai)

Director
Wilson Yip

Writer
Kam-Yuen Szeto
Lik-Kei Tang