Archaeologist Shum finds an antique jade with supernatural power in Greece. The stone is wanted both by KGB's agent Karoff and the Interpol. Shum asks his friend Nike for help. However, Shum is finally caught by KGB but the jade is slipped into the hands of a boy called Pan.
Sammo and George Lam are partners in crime and they scam some triad big shot out of a load of money and decide to retire. Three years later they both receive letters from Stanley Fung, in which he informs them that he has proof of all their criminal activity and unless they do exactly what he says–he will turn it over to the cops. Fung is an ex-cop himself and is trying to get the goods on the same triad leader that Sammo and George scammed.
Wah runs a brothel and has a daughter, Yan, on the loose, born and bred in the same underworld. The two finally go on an ultimate collision course emotionally…
The Royal Hong Kong Police put into operation a new plan to counteract the problem of increasing violent crimes committed by new arrivals from across the border in China. In agreement with Chinese authorities, three Hong Kong detectives go undercover as illegal immigrants in order to infiltrate the powerful gang that is organising the crime wave.
