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.
- Genre: Comedy, Crime, Fantasy
- Studio: Paka Hill Film Production Co., Mandarin Films Ltd., Mandarin Recording Studio Ltd., Doris Dubbing Production Co., Mandarin Laboratory (International) Ltd., Fine Art Production Co.
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- Cast: Tony Leung Chiu-wai, Kent Cheng Jak-Si, Sonny Song, Cheng Pak-Lam, Sylvia Chang, Anthony Wong Chau-Sang