After a late-night triad dispute leads to the death of an innocent civilian, PTU officers take action by investigating triad activities in the area.
| Actor | Role |
|---|---|
 Simon YamSgt Lee Wing Sam | Sgt Lee Wing Sam |
 Maggie Shiu Mei-KeiSgt May Cheung Pui Yee | Sgt May Cheung Pui Yee |
 Lam SuetSarge | Sarge |
 Samuel Pang King-ChiCrack | Crack |
 Derek Tsang Kwok-CheungFai | Fai |
 Wong Man-ShingLok | Lok |
| WWu LiCheung Man Wai | Cheung Man Wai |
 Osman HungPC Chung | PC Chung |
| OOtto WongSam's team member | Sam's team member |
 Luk Man-WaiSam's team member | Sam's team member |
| RRoderick Lam Chung-KeiSam's team member | Sam's team member |
 Jason ChangMay's team member | May's team member |
 Courtney WuNot listed | Not listed |