A hot-shot lawyer is hired by a Hong Kong chemical plant to dispose of opposition to their polluting ways. But when he falls for a beautiful woman out to stop the plant, he is torn in a conflict of interest and asks his trusty friends Samo and Biao to help out at least until they discover the true purpose of the plant.
Dragon is now transferred to be the police head of Sai Wan district, and has to contend with a gangster kingpin, anti-Manchu revolutionaries, some runaway pirates, Manchu Loyalists and a corrupt police superintendent.
A seasoned cop and his rookie partner try to solve the murder of a heroin trafficker.