When Cheng Kam-Fu (Lawrence Ng) reports his wife missing to the police, Detective Lau (Anthony Wong) suspects there’s more to the disappearance than meets the eye. While his colleagues remain uninterested, Lau begins round the clock observation on Fu’s shop/flat, paying particular attention to his mistress, Lo (Li Yu).
| Actor | Role |
|---|---|
 Anthony Wong Chau-SangOfficer Lau | Officer Lau |
 Yu LiMiss Lo | Miss Lo |
 Ivy Leung Si-ManTina Lo | Tina Lo |
 Lawrence NgCheng Chin Fu | Cheng Chin Fu |
 Chang Gan-WingLau's father cum superior | Lau's father cum superior |
 Maria CorderoLau's cop mother | Lau's cop mother |
 Perrie Lai Hoi-SanMilky | Milky |
 Leung Gam-SanNot listed | Not listed |
 Keith Ng Shui-TingNot listed | Not listed |
 Carol TamNot listed | Not listed |