Because of the bad years in his hometown, the young man Zheng Chaoan (played by Bruce Lee) followed his uncle to Thailand. With the help of local Chinese worker Xu Jian (played by Tian Jun), Zheng got a job in an ice factory. Xu Jian is a righteous man who likes to fight for justice and is often involved in fights. Although Zheng Chaoan has learned kung fu, he cannot do anything because of his mother's admonition. In order to make profits, the ice factory where the Chinese workers work hides drugs in ice for trafficking. Soon, two Chinese workers were killed by the factory director and the boss because they accidentally picked up drugs in the ice. Xu Jian asked the boss for people, but was brutally killed by the other party's thugs at home. The workers searched for the missing Chinese workers and Xu Jian but failed, so they went on strike to protest. The factory director and supervisors beat the workers. Zheng Chaoan took action for justice. The factory director was afraid to promote him to a leader, and the workers called Zheng "Tangshan Big Brother". Seeing that he failed to win over Zheng Chaoan, the boss killed all the Chinese workers. Zheng Chaoan rushed to the boss's house, wanting him to pay for his blood debt with blood...