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.
| Sound | Joseph Koo | Original Music Composer |
| Writing | Raymond Wong Pak-Ming | Writer |
| Directing | Johnnie To Kei-Fung | Director |
| Production | Raymond Wong Pak-Ming | Producer |
| Camera | Paul Chan | Director of Photography |
| Camera | Bob Thompson | Director of Photography |
| Camera | Joe Chan Kwong-Hung | Director of Photography |
| Visual Effects | Tsui Hark | Visual Effects Coordinator |
| Crew | Ringo Lam | Stunt Coordinator |
| Art | Raymond Chan Kam-Ho | Art Direction |
| Art | Dominique Lo | Art Direction |
| Editing | David Wu | Editor |
| Crew | Tony Ching Siu-Tung | Stunt Coordinator |
| Crew | Joe Chu Kai-Sang | Stunt Driver |
| Crew | Karl Maka | Presenter |
| Crew | Dean Shek Tin | Presenter |
