After the Japanese invaded China, the people were in vain. The young countryman Chen Zhen (played by Donnie Yen) brought his sister Xiaoyan to the bustling Shanghai to make a living.After arriving in Shanghai, Chen Zhen became a rickshaw driver, while Xiaoyan entered a hospital to work as a nurse.Chen Zhen would pull the Japanese girl Takeda Yumi (played by Wan Qiwen) who works as a nurse in the same hospital every day, and the two gradually fell in love.Chen Zhen loves martial arts and often practices according to the moves in books in his spare time. By chance, his skills were discovered by Cai Liujin, the boss of the Qing Gang, so he was recruited into the Qing Gang as a thug.Chen Zhen quickly became the number one thug in the Qing Gang, while her younger sister Xiaoyan was always very worried about her brother. She always thought that her brother would not have a good end in the underworld.Afterwards, Xiaoyan was unfortunately killed by a horse thief. Chen Zhen, who was extremely sad, finally woke up and from then on, Jinban washed his hands and withdrew from the Qing Gang.At that time, Huo Yuanjia, the head of the anti-Japanese organization Jingwu Sect, discovered that Chen Zhen was a piece of martial arts material, so he gave him guidance. After receiving guidance, Chen Zhen's martial arts improved rapidly and eventually avenged Xiaoyan.Chen Zhen was grateful to Huo Yuanjia and joined the Jingwu Sect.At this time, Yumi's Japanese fiancé came to Shanghai. When he learned about the incident between Yumi and Chen Zhen, he decided to go to Chen...