A young, unsuccessful singer, after committing suicide, is to be reincarnated, this time into a musical family. Her spirit must get to the hospital where her future mother is currently ready to give birth to her, so that she can enter the womb and be born. Unfortunately, she misses her appointed birth time, twice, due to the accidental intervention of a young man, Mr. Hong. At first she is angry and makes life hard for him, but eventually they fall in love, although she can't stay around long as she has one last chance to be born.
Unfortunately the movie Happy Ghost III is not yet available on HBO Max.
| Directing | Johnnie To | Director |
| Production | Raymond Wong | Producer |
| Sound | Joseph Koo | Original Music Composer |
| Writing | Raymond Wong | Writer |
| Crew | Dean Shek | Presenter |
| Crew | Karl Maka | Presenter |
| Crew | Joe Chu Kai-Sang | Stunt Driver |
| Crew | Tony Ching Siu-Tung | Stunt Coordinator |
| Camera | Bob Thompson | Director of Photography |
| Camera | Joe Chan Kwong-Hung | Director of Photography |
| Camera | Paul Chan | Director of Photography |
| Art | Dominique Lo | Art Direction |
| Art | Raymond Chan Kam-Ho | Art Direction |
| Editing | David Wu | Editor |
| Crew | Ringo Lam | Stunt Coordinator |
| Visual Effects | Tsui Hark | Visual Effects Coordinator |
