A vicious judo expert sets out to prove that Chinese are the "sick people of Asia." There's only one thing which will set things right: the powerful title kung-fu technique, taught by Shih Szu (The Lady Hermit) and learnt by Chuan Yuan (Imperial Swordsman)!

A small village is taken over by the "nasty" Japanese, who kill the town's top kung fu fighter in order to scare the populace into submission. Escaping the wrath of the Japanese, the son of the master (Chuen Yuen) flees into the hills, where he trains with a group of rebels led by Gam Kei-Chu. Fast-forward ten years, and Chuen returns to the village armed with his father's secret technique of the "Thunderbolt Fist" with the hopes of killing the leader of the Japanese (James Nam Gung-Fan).