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.
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.
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.
Banker Fung Yan-tsang is a seasoned criminal in fraudulent activities. The righteous cat burglar Ham Siu-fo has issued a deadline for Fung to return the scammed money.
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.
Property company chairman Hu Zian was attracted to his secretary Sun Yuxia's beauty and competence. One day after dinner when Hu was escorting Sun home, he received from a child on the street a box containing a mirror and two silver coins engraved with dragons.
