On the seventh day after the death of the great hero Huo Yuanjia, Hu En (played by Wei Pingao), a translator from the Japanese Hongkou Martial Arts Hall, was commissioned by Suzuki Hiroshi (played by Hashimoto Riki) to provoke the Jingwu School. Huo Yuanjia's fifth disciple, Chen Zhen (played by Bruce Lee), unable to bear the humiliation, went to the martial arts hall alone to fight and defeated dozens of people. Suzuki Hiroshi was furious and sent people to vandalize the Jingwu School, demanding the surrender of Chen Zhen within three days. To protect Chen Zhen's life, the elder brother (played by Tian Feng) ordered Chen Zhen to leave Shanghai. That night, Chen Zhen accidentally discovered clues about his master's poisoning. In a fit of rage, he killed the murderer (played by Huang Zongxun) and his accomplice (played by Han Yingjie), and decided to uncover the mastermind behind it all...