In realising their scheme to rule the underworld, the Poisonous Snake Gang breeds the 'Blue Poisonous Bees' and sends Red Rose to the Flying Dragon Gang to execute the 'Flying Sting' mission. Chased by Lung King-tin, both of them are captured by Anna Tai of the Female Monster Gang. The three gangs fight for the possession of a nuclear pistol and allegiances shift as the agents fall in love.

Sit Muk-fu covets the beauty of the maidservant Ku Kar-lin. Ku concocts a scheme with her husband Wong Hoi to swindle money out of the lascivious man and has to flee into hiding with Sit being stabbed to death during their secret liaison. Detector Lui Hak investigates into the murder at Ku's house and arrests the husband who has a sharp knife in his possession. Bearing witness to the murder, their daughter Bo-bo fights to prove her father's innocence. Upon receiving a score of mysterious phone calls revealing Ku's whereabouts, Lui lures the woman out with Bo-bo as bait, subduing and detaining the suspect. The detective fathoms the mystery of the murder case which leads him to another suspect, But Kei. But has been extorting money from Sit and forces his daughter, the sole heir to his inheritance, into marriage in return for concealing his murder-for-money scheme. But submits to arrest without resistance while Ku and husband walk free, acquitted of the charges.

Wan Cho-sin has two daughters. The elder sister Wai-man is genteel and graceful, and the younger sister Wai-ping, taken under the tutelage of Lady Knight Silver Fox, is extrovert, outgoing and gregarious. The drug kingpin Chung Chi-wang has his eyes set on Wai-man but the girl is in love with Ma Kim-leung. Ko Tin-yam, who fearlessly wields his journalistic pen against the gangster, joins forces with his girlfriend Wai-ping to beat off Kong Yau-ming and the thugs dispatched by Chung. The encounter, leads to Kong's recognition of Wai-ping as his flesh and blood entrusted to Cho-sin's care years ago. Wai-ping pleads with her father to turn over a new leaf but fails to save him from Chung's murderous hand. Wai-man and Ma ingratiate themselves with the gangster, who uses the duo to elude the police while transferring drugs to a secluded villa. Wai-ping tips off the authorities about the traffickers' whereabouts and cracks down on the drug ring.