An operation in Thailand against a notorious drug lord changes the destiny of a Hong Kong Police Department narcotic team. Five years later, a drug dealing brings them together again.
| Actor | Role |
|---|---|
 Nick Cheung Ka-FaiWai | Wai |
 Lau Ching-WanMa Ho-Tin | Ma Ho-Tin |
 Louis KooChow | Chow |
 Yuan QuanChloe Yuan | Chloe Yuan |
 Ben Lam Kwok-BunHak Tsai | Hak Tsai |
 Ken Lo Wai-KwongBobby | Bobby |
 Lo Hoi-PangEight-Face Buddha | Eight-Face Buddha |
 Berg Ng Ting-YipWong Shun-Yik | Wong Shun-Yik |
 Vithaya PansringarmMr. Choowit | Mr. Choowit |
 Treechada PetcharatMina Wei | Mina Wei |
 Helena Law LanWai's mother | Wai's mother |
 Xing YuKanit | Kanit |
 Hugo Ng Doi-YungM. D. Wong | M. D. Wong |
 Marc MaDune Kun | Dune Kun |
 Lee Siu-KayInformer Kei | Informer Kei |
 Wong Man-ChunDrug dealer | Drug dealer |
 Ronald Law Kwan-MoonDavid | David |
| BBrian Yeung Kwok-ChungKin | Kin |
 Samuel Yau Man-ShingCheng Tai-Kwan | Cheng Tai-Kwan |
| YYuen Yee-ManNot listed | Not listed |
 Jacqueline ChanKelsey | Kelsey |
 Hugo Wong Tsz-HangNot listed | Not listed |
 Jason WongNot listed | Not listed |
 Elanne Kwong Yeuk-LamWai's friend | Wai's friend |
 Kenneth Cheung Moon-YuenNot listed | Not listed |
 Au Hin-WaiNot listed | Not listed |
| LLam Kwok-KitNot listed | Not listed |
 Chris CollinsNot listed | Not listed |
 So Wai-NamNot listed | Not listed |
 Lui Siu-MingNot listed | Not listed |