Cat and Mouse is a 2003 Hong Kong wuxia romantic comedy film directed by Gordon Chan, and starring Andy Lau, Anthony Wong and Cecilia Cheung. The film is loosely based on the 19th century novel The Seven Heroes and Five Gallants by Shi Yukun.

Plot

Zhan Zhao (Andy Lau) is a court officer who learns of a plot to assassinate Judge Bao (Anthony Wong). While on holiday he meets a young man named Bai (Cecilia Cheung) who turns out to be a woman. Zhan Zhao tries to recruit Bai to help him stop the assassination of Judge Bao.