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.
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.
While touring abroad in Europe, beautiful American skydiver Fathom Harvill gets wrapped up in international intrigue when Scottish spy Douglas Campbell recruits her to help him on a secret mission.
An assassin called Filthy Harry is hired by a shady figure and charged with killing the heroes. The men are framed twice for different robberies by King Kong's new girlfriend, nearly committed to a mental hospital by their devious boss, and forced to battle Filthy Harry's weaponry-laden robot while covered with time bombs.
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.
