Chen Chen returns to his former school in Shanghai when he learns that his beloved instructor has been murdered. While investigating the man's death, Chen discovers that a rival Japanese school is operating a drug smuggling ring. To avenge his master’s death, Chen takes on both Chinese and Japanese assassins… and even a towering Russian.

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

From an unhappy childhood experience, Law Ka Sing decisively hides his homosexual identity. Sing's partner of 8 years, young boyfriend Sunny is just the opposite, he has never minded publicly revealing his identity.