Following up on smash success of the original, Johnny Mak -- the director of the first film -- produces while Michael Mak directs this straight away crime yarn. Swapped by a recent spate of heists by Mainland criminals, Hong Kong cops decide to infiltrate the gangs responsible. They recruit a trio of Chinese -- Li Heung-tung (Tsui Kam-Kong), Hok Kwan (Yuen Yat-choh), and King San (Ben Lam Kwok-bun) -- offering them citizenship if they help the police for two years. Under their constabulary boss, Biggy (Alex Man), they are assigned to embarrass Mainland crime boss, Siu Hung (Kirk Wong), in order to establish some street cred. Soon the three are cracking case after case for the police. Yet when one of the targeted criminals proves to be the same guy who once saved his life, King San starts to question his loyalty. Meanwhile, Hok makes an ill-conceived run for the border with a bar girl (Pauline Wong) and a stash of stolen money. When the girl rats him out, he skips town but his actions effect his former partners. ~ Jonathan Crow, All Movie Guide