Mainland Inspector Cheng Shih-Nan once again leaves the Mainland with her cousin Hsiou Sheng to tackle a Hong Kong-related murder. They get help from their Hong Kong brethren, including the brother of Wu Kei Kuo, and the race is on to find the bad guys! But there are still many mysterious portions of Hong Kong’s capitalist culture for Shih-Nan to explore, including the wonder of karaoke!

In this third sequel, Mainland cop and perennial straight-woman Cheng decides on a civilian life in Hong Kong, but her immigration quickly proves comical.

An aspiring starlet arrives in the Fragrant Harbor with dreams of becoming a star, whilst striking up a friendship with a wannabe cabbie who lives in the same apartment building.