The story concerns the efforts of the emperor to obtain the Dragon Sabre and it's companion magic sword so the "martial world" will be forced to respect him. He enlists a bad guy who plots a massacre of the Mongolians to blamed on the "Ming cult" so that the Mongolian hero played by Ti Lung will attack and steal the sabre from the cult and then give it to the bad guy who has in the meantime stolen a powerful magic sutra from Budhhist nuns, kidnapped a Mongolian Princess and is trying to become a Yin/Yang fighter which looks like ... wait, none of this makes much sense, but that's the film. Derek Yee plays the hero of the Ming cult who is trying to find out who is framing the cult for the massacre.
This mystery-tinged 'Martial Arts World' epic was one of director Chu Yuan and novelist Ku Lung's last together for the Shaw Studios, but it's another action-filled winner. Liu Yung and Sun Chien team to investigate the martial arts murders of a supposedly mortally wounded swordsman, only to find deception, death, double-dealings, imposters, and one deadly duel after another. No less than three choreographers are on hand to handle the multitude of magnificent martial arts.
When a gang war breaks out over disputed territory, crime boss Wai blames his lieutenant, Ah Sing, for failing to wipe out the competition.
The film revolves around the exploits of a detective agency in Hong Kong called Mannix Private Detective Agency. It is headed by private detective Wong Yeuk Sze (Michael Hui) with his emotionally drained assistant Puffy (Ricky Hui). Meanwhile, Lee Kwok Kit (Samuel Hui), a kung fu expert, who works at a Vitasoy plant factory and spends most of the time doing kung fu tricks to impress a girl, ultimately loses his job. Seeking to find another line of work, Lee attempts to joins Wong's detective agency. Despite Lee's impression with his kung fu talent which involves his snatching trick, Wong was not impressed. Then, as it appears that Lee would not get the job, Wong discovers that his wallet was missing and was presumed stolen by one bystander who bumped into them. Lee intercepts him and recovers the wallet, thus impressed Wong to hire him for the job.
Kan's man
Tan Jen-chieh's life spins out of control when he’s forced into exile to clear his name following the murder of his adopted father. He's hunted in the streets. His lover, Butterfly, turns to prostitution. And his father's likely killer – a smooth operator known as the Rambler – is always lingering nearby. But before Tan and the Rambler can slit each other's throats, they learn they've been double-crossed and go two against everyone in a rage of double-edged vengeance.
