Ho Pui-lan was the secretary of the writer Wu Him, but she died suddenly at home. Ho's mother commissioned private detective Chan Kin-chau to investigate and found out that Pui-lan and Him were having an extra-marital affair, and also discovered that the contents of Him's fiction were similar to the contents of Pui-lan's suicide note. When Kin-chau finds out that the contents of Him's fiction are similar to the contents of Pui-lan's suicide note, he and Pei Lan's sister Yuk-lan reenact the murder case, and Him is stimulated and hallucinated to reveal the truth of the murder...
Unfortunately the movie The Detective is not yet available on Disney Plus.
| Directing | Tso Kea | Director |
| Writing | Woo Mei-Bing | Screenplay |
| Production | Ho Kiam Ngiap | Producer |
| Directing | Wong Sum | Assistant Director |
| Directing | Lou Wai | Script Supervisor |
| Crew | Chan Kon | Cinematography |
| Costume & Make-Up | Chan Man Fai | Makeup Artist |
| Costume & Make-Up | Tsui Kam-Lun | Hair Assistant |
| Editing | Sung Ming | Editor |
| Art | Chan King-Sam | Set Designer |
| Sound | Mui Ching | Sound Recordist |
| Sound | Lau Wang-Yuen | Music |
| Crew | Edward Hoh Yue-Yip | Manager of Operations |
| Production | Lam Wai | Production Manager |