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.
Tony Leung Chiu-wai
Kent Cheng Jak-Si
Cheng Pak-Lam
Anthony Wong Chau-Sang
Sonny Song
