The Hong Kong Police placed 1000 undercover officers in the various Triad groups in their efforts to bring down the criminal organization in Hong Kong. After one undercover officer's identity is discovered and he is killed, the pressure is put on one gang, suspicious of each other and everyone around them. Betrayal, deceit and murder bring this group of 'brothers' into a collision with the law, and each other.
| Actor | Role |
|---|---|
 Francis NgWah Chiu | Wah Chiu |
 Eric Tsang Chi-WaiJim | Jim |
 Jordan Chan Siu-ChunFei | Fei |
 Julian CheungTommy | Tommy |
 Sonija Kwok Sin-NaeElaine | Elaine |
 Michael Miu Kiu-WaiSuperintendent Wai | Superintendent Wai |
 Nie YuanSuperintendent Mok | Superintendent Mok |
 Na WeiLawyer Martin | Lawyer Martin |
 Yue Man-lokKiller | Killer |
 Timmy Hung Tin-MingEric | Eric |
 Jazz Lam Tsz-SinKin | Kin |
 Elliot Ngok WahBoss | Boss |
 Qin HailuSophie | Sophie |
 Patrick Tang Kin-WangBall | Ball |
 Kenny Wong Tak-BanBig Mouth | Big Mouth |
 Jonathan Lee Yat-SingDee | Dee |
 Joe Cheung Tung-ChoChief Superintendent Kong | Chief Superintendent Kong |
| WWong Siu-YinTommy's mother | Tommy's mother |
 Au Hin-WaiMr. Ho | Mr. Ho |
 Zuki Lee Si-PuiNot listed | Not listed |
 Johnny LuNot listed | Not listed |