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.

When a family is bankrupted by a counterfeiter named Gold Fist, the daughter (played by Connie Chan) vows to get revenge. As she tracks down the villains, she comes across a drifter who is escorting a young man to his father, who is being kept in captivity by a gang of thieves. When it is discovered that the captive father and Gold Fist are the same person, loyalty and friendship are put to the test.

Tse Mei-chen is deeply concerned about her only family, sister Bo-chen who is obsessed with perfecting her detective sensibilities. One day, Bo-chen returns home in panic to relay to her sister and her boyfriend detective Ma Tin-lung the horrifying murder of Siu-ying by her husband Tsui Kai. But a subsequent visit to the couple's, the cousin of Bo-chen's best friend Wong Kam-fung, proves the alleged crime false. Incognizant to all, the victim was Siu-ying's twin sister Kwok-ying, who bore witness to Tsui's misappropriation of their wealth for drug trafficking. Refusing to abandon the probe, Bo-chen is held up by Tsui. Deeply perturbed by Ma's investigation into his secret dealings, Tsui coerces Mei-chen to distract her boyfriend long enough for his escape. Refusing to bow to the threat, Mei-chen informs Ma who leads his squad to the rescue of the sister and arrests Tsui and his accomplices.

The agile and cerebral fighter Kong Yin is invited to join the police SWAT team. Kong is soon sent on an undercover mission to investigate the gang operating at the Happiness Rubber Plant to coerce female workers into prostitution. An indignant Kong joins hands with fellow worker Chow Mei-ha and factory head Wong Chi-kong to expel Blackie Kei whose ruthless and blatant exploitation of the workers has been going unpunished. Facing the loss of a lucrative source of income, Blackie and his underworld bigwig boss Wu Tin-hung intercept the love letters exchanged between Wong and the wife of the general manager Ting Yuk-lan and use the correspondence to extort money from the adulterers. The fearless Chow dons a maid disguise and ingratiates herself with the gangster, followed by a police raid masterminded by Kong to crack down on the notorious gang.