The three heroines, Wong Ang, Wu Nga, and Heung At expose a murder case involving three dead bodies found in an old temple. Unbeknown to the trio, they've fallen in a trap laid by gangster Hui Pui-shing, who desires to avenge his brother's death by eliminating the women. With the cooperation of Hui's righteous subordinate, the police arrest Hui for smuggling tobacco and seizes their forged banknotes.
Club 99 is not just a hideout for triad gangsters, but also a haven for smuggling jewelleries from robbery. When detective Law is investigating a jewellery heist, he is ambushed by the men from Dog Stone (Sek Yin-tsi) who is the owner of Club 99. Then, Law's daughter Fong (Law Yim-hing) helps her father to be undercover and disguises herself as a dancer in the club and gambler Lung (Lam Kau) is also an informant for the police force. While Dog Stone is cunning enough to discover their identities, there are in fact more undercover agents in the club...Influenced by Hollywood's semi-documentary style, the film has a detailed yet complex portrayal of human natureļ¼undercover anxieties, domineering gangsters and moral ambiguity. With its realistic chasing and action sequences, the film is nonetheless a very entertaining piece of cinema.
Yim Tai-hung stages a diamond heist but one of his men slips away with a diamond necklace. Sustaining a fatal wound, the betrayer gives the necklace to his friend Chow Ping at Rose Apartment before he expires. Chow calls her cousin Wu Nga for help. But Wu, Wong Ang and Heung At come too late. She however manages to reveal the whereabouts of the necklace at her last breath. The trio is framed for the murder but is later acquitted. Striving to crack the case, Wong infiltrates the apartment at night and uncovers the necklace, which is then used to lure the real culprit out. But her plan is foiled by a young and reckless Wu who falls into Yim's trap. Luckily Wong and Heung deliver the hostage to safety while the police arrest Yim's accomplices and kill the ringleader in the ensuing shootout.
