Two inventors encounter a friendly little ghost, and stumble onto a plot to capture the ghost's uncle who was responsible for his untimely death. However, the inventors are warned by a spiritual master that humans and ghosts cannot co-exist in the same room at the same time. Doing so would cause a drainage of humans' life force.
| Directing | Johnnie To | Director |
| Writing | Yuen Kai-Chi | Screenplay |
| Production | Catherine Hun | Producer |
| Art | Ringo Cheung | Art Direction |
| Camera | Patrick Jim | Director of Photography |
| Editing | Wong Shui-Yan | Editor |
| Sound | William Wu Wai-Lap | Original Music Composer |
| Costume & Make-Up | Bruce Yu Ka-On | Costume Designer |