Basically a love story with a prerequisite sub-plot about a crazed killer trying to avenge his brother.

The males in a triad family are betrayed and gunned down by a rival gang and the women in the family - from the matriarch to the youngest - decide that rather than sit around and mourn their men that they will extract revenge.

After the death of Marshal Yuen, a princess is arrested by a constable whilst training with her kung-fu teacher. They are soon drawn into a conflict which centres around the mysterious man with the golden snake sword - an incredibly powerful magical weapon. Golden Snake Man is seeking revenge on the castle of the Wan family, but Wan has married his former lover. The Five Poison Sect of fighting (and flying) women have entered into an uneasy alliance with the forces of the Manchu Master Wu to steal the golden snake sword. Wan's daughter is torn between her father and her love of the constable. The constable must decide between his brotherly love for the Golden Snake Man and his sense of justice. Meanwhile a blind old man seeks to return the powerful Sword Stained With Royal Blood to the son of Marshal Yuen.

Narcotics officer Shaolun (Tony Leung Ka Fai), in order to bring down the local drug kingpin King (Michael Wong), forces a female street thug with an equally sketchy past, Coco (Rosamund Kwan) to infiltrate King's organization and provide information. What no one expected was for both men to fall for Coco, and Coco for King.

The head of the Organized Crime and Triad Bureau, Inspector San Lee, will do anything to put triad boss Tung in jail.

This story follows a cop in Shanghai during the 1930s. His department is overrun with corruption, while gangsters rule the city via the opium trade.

Cindy, an American FBI agent, travels to Hong Kong to investigate a newspaper editor, Ronny Dak, who is suspected of printing counterfeit money using the newspaper’s presses. The American teams up with a rival reporter and her friend Yu, an undercover law enforcer. Cindy’s investigation takes a sharp turn, however, when Yu’s father, the prosecuting lawyer in the counterfeiting case, is kidnapped.