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 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.
The Yang family, men and women, have served their country loyally for generations. During the war General Yang is ambushed and killed. His widow and the entire family set out to avenge his death and defend the country.
A young boxer joins a martial arts school to increase his skill so he can enter a martial arts competition. He leaves the school when he hears that a local gangster is terrorizing the town. He comes to the aid of a young singer and brings on the wrath of the local gang. He eventually enters the martial arts competition after learning iron palm technique and takes out all competition.
Instructor Lin who is home from training the imperial troops for several years. He meets his wife and runs into his brother who has become a monk at the local temple. His superior Lord Gao, strangely decides to rape Lin's wife in the temple but Lin interrupts the crime. His brother is enraged and tries to kill Gao but Lin stops him with the help of Lin's training brother and old friend Lu who works for Gao. Lin is loyal to the Commissioner and will not do anything to harm his son. Once back at the Commissioner's house, Gao and Lu hatch a plan to discredit and eventually kill Lin all with the Commissioner's approval. The plan is put into motion and Lin is unjustly arrested for trespassing on imperial property.
