CID officer Tong gets himself entangled with a gang of killers from mainland China, who are out killing criminals to rob them of their money, and using an ideological basis to justify the killings as protecting mainland China from the criminal scum of Hong Kong.
| Actor | Role |
|---|---|
 Simon YamSam | Sam |
 Maggie Shiu Mei-KeiMadam May | Madam May |
 Lam SuetFat Tong / Sgt Lam Tong | Fat Tong / Sgt Lam Tong |
 Gordon Lam Ka-TungChan Yiu-Hung, loan shark | Chan Yiu-Hung, loan shark |
 Berg Ng Ting-YipBrother Kong | Brother Kong |
 Kam Loi-KwanBrother Yuen | Brother Yuen |
| CChin Ka-ShingShek | Shek |
 Philip Ng Wan-LungRobber | Robber |
 Au Hin-WaiOfficer Wong | Officer Wong |
 Frank Liu Zong-JiPTU | PTU |
 Chang Kin-YungPTU | PTU |
| LLai Chi-WaiPTU | PTU |
 Kwok Yuk-KeungCrime Unit officer | Crime Unit officer |