Ho Sau, an undercover agent, has been working with Yau, a drug lord, for years, but his job and family are in trouble.
| Actor | Role |
|---|---|
 Andy LauGeorge Lam | George Lam |
 Gordon Lam Ka-TungSau Ho | Sau Ho |
 Eddie Peng Yu-YanEddie Fong | Eddie Fong |
 Liu YaseVivian Ha | Vivian Ha |
 Simon YamChung Kam Ming | Chung Kam Ming |
 Lam SuetYuen Muk Yu | Yuen Muk Yu |
 Kent Cheng Jak-SiUncle Cat | Uncle Cat |
 Keung Ho-manChan Chiu Sang | Chan Chiu Sang |
 Hedwig TamMaggie Kong | Maggie Kong |
 Terrance Lau Chun-HimDavis | Davis |
 Kevin Chu Kam-YinChan Sung Lam | Chan Sung Lam |
 Angie Cheung Wai-YeeAunt Chiu | Aunt Chiu |
 Tony HoHo Wing | Ho Wing |
 MJ ChanSilence | Silence |
 Cheng TaoPang Zit | Pang Zit |
 Giselle LamLee Tze Man | Lee Tze Man |
 Justin ChuChow Man Hing | Chow Man Hing |
 Wesley WongChin Hei | Chin Hei |
 Jane WongCIU Madam | CIU Madam |
 Mike LeederJavier Escobar | Javier Escobar |
| GGuillaume Paul Andre LosguardiCargo Ship Captain | Cargo Ship Captain |
 Pang Mei-SeungOld Lady | Old Lady |
 Ceci WuNews Anchor | News Anchor |
| YYeung YanCIU Police | CIU Police |
| AAu Chi-SuenCIU Police | CIU Police |
| MMac NgCIU Police | CIU Police |
| RRex SitCIU Police | CIU Police |
| TTobby Chui Hiu-ManCIU Police | CIU Police |
| JJiang QiangCIU Police | CIU Police |
| HHo Zak-KyunCIU Police | CIU Police |