After the box office success of Happy Bigamist in 1987, Anthony Chan follows up with more 80s rom-com shenanigans in One Husband Too Many. Theater enthusiast Sun (Anthony Chan) is so passionate about drama he sells his home to stage Romeo and Juliet. The plays turns out to be a complete failure, however, and the last straw in the hat for his wife (Anita Mui) who silently leaves him. Marriage isn't working out too well for his friend Wa (Kenny Bee) either. Fed up with a husband who he spends too much time at work and not enough time at home, Wa's wife (Pat Ha) suddenly ups and leaves. Things finally look up for Sun when he produces a popular play starring rich girl Hung (Cherie Chung), and the two begin dating. But it turns out Wa also has his eyes on Hung...
Inspector Chu is an idiot to rival Inspector Clouseau. After he fails to catch a car-park full of thieves he is demoted to the missing persons squad, only to be faced with the kidnapping of the son of the star of a TV cooking show. Inspector Chocolate bungles the case, fails to dance the tango and interferes with the Miss Hong Kong pageant in his attempts to solve the case