Expert of lithographic plates and counterfeit banknotes Lee Lik-hang is hunted down by the hitman Ma Biu on the orders of the gang leader Chan Lung. Cheng Wai-lun, witness to the crime and the unwitting custodian of the plate, finds himself wanted both by the police and the criminals. Seeking to unweave the web of intrigue is Kong Yin, cousin of Cheng's fiancée Cheung Mei-ling and the famed 'Lady Bond' who poses as the gambler Judy and doubles as a singer at Chan's nightclub. Kong identifies the boss as the culprit but is forced to flee following a failed attempt to obtain the needed evidence. Both Ma and detective Chow To reach Cheng who chooses police detention over abduction by the gang. Cheng evades Chan's underlings and hands the hitmen over to the authorities. Cheung's abduction results in a fierce battle when Chow and his squad arrive at the criminal den, arresting the gang leader and retrieving the lithographic plate.

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.

The Lok's family disperses when Japanese occupied China. Mrs. Lok's company prospers in Hong Kong. Her son Tin-yam looks after her business. She misses her daughter. Another daughter Chui-yin dates Kuk-tat. Mrs. Lok hopes that Tin-yam will find a good partner. Wan Yuk-yin works in Mrs. Lok's company and meets Tin-yam. They fall in love. Mrs. Lok asks Yuk-yin to leave Tin-yam. Facing his mother's objection, Tin-yam falls ill. Mrs. Lok let them marry. The wedding guests despised the bride, which makes Mrs. Lok uncomfortable. The couple lives happily, but Mrs. Lok and Chui-yin make Yuk-yin embarrassed. Kuk-tat covets the Loks' fortune. He steals their jewels. Mrs. Lok thinks Yuk-yin did it. Yuk-yin is innocent, but she is expelled. Tin-yam returns. Yuk-yin's parents seek justice at the Loks. Mrs. Lok's saw the Yuk-yin's birthmark. She realizes Yuk-yin is her lost daughter. Mrs. Lok decides to be a dutiful mother. Tin-yam is an adopted son of the Loks so the couple lives happily.

The Flying Dragon gang goes on a rampage and the police Inspector is at his wits' end. He then commissions Wong Ngung, Wu Ngar and Heung Nga to help him catch the gang members. Suet-ying, a young woman, is addicted to gambling and owes a huge sum to the gambling den that belongs to the Flying Dragon gang. She has even signed IOUs. When the younger sister of Ying's husband sees that Ying is weighed down by worries, she asks Wu Ngar for help. Wu Ngar sneaks into the gambling den, but her behaviour is suspected by the gang leaders, Tai-kit and Tai-hong. Fortunately, Wong Ngung saves her. To get back the IOUs, Ying falls under the control of Hong and Kit. Master Lung has evil designs on Ying. He first kills Kit and seizes Ying. Hong then shoots and kills Lung. Wong Ngung and her two partners get back the IOUs for Ying. They notify the police Inspector to arrest the members of the Flying Dragon gang. Hong is shot and injured by Wong Ngung. He is arrested with the other gang members.