Hotheaded cop Bill Chu gets relegated to the Emergency Unit after a dustup with his inept boss. When the mob kills Chu's pal and ex-colleague during a turf-war hit, he rounds up his motley department cohorts and embarks on a mission of revenge against the gangsters.
| Actor | Role |
|---|---|
 Lau Ching-WanSergeant Bill Chu | Sergeant Bill Chu |
 Jordan Chan Siu-ChunInspector Jeff Chiu | Inspector Jeff Chiu |
 Theresa Lee Yee-HungApple | Apple |
 Cheung Tat-MingMatt | Matt |
 Yu RongguangThe Professor | The Professor |
 Anthony Wong Chau-SangBird | Bird |
 Spencer Lam Seung-YiDan | Dan |
 Francis NgInspector Yeung | Inspector Yeung |
 Berg Ng Ting-YipInspector Kwan | Inspector Kwan |
 Vincent Kok Tak-ChiuTung Fai | Tung Fai |
 Ruco Chan Chin-PangChiu Sai Wing | Chiu Sai Wing |
 William Duen Wai-LunRichard | Richard |
| JJessica Lee LeeSandra | Sandra |
 Dayo Wong Chi-WahBill's Informant | Bill's Informant |
 Jimmy Wong Wah-WoCop | Cop |
 Radium CheungThug | Thug |
| BBruce FontaineInterpol Officer | Interpol Officer |
 Gary Mak Wing-LunSCU Officer | SCU Officer |
 Cheung Yuk-WahNot listed | Not listed |
| KKa-Lun ChuiNot listed | Not listed |
 Fei PakNot listed | Not listed |
 John WakefieldNot listed | Not listed |
 Raymond Tsang Chau-MingNot listed | Not listed |