Invincible One

Impetuous young martial arts master Kuan takes a job at a textile factory where another disciple of the revered Shaolin discipline warns him about the rival Manchu clan, who run another nearby mill. Combat breaks out between the two warring camps, with Kuan becoming his boss' right-hand man but becoming distracted by the promise of wealth. Soon his skills are put to the test by his opponents, who practice expert boxing and the deadly: Iron-Finger Lock, which can kill a man in his tracks. (official distributor synopsis)