In Northeast China in the 1990s, Tietou (Jackie Chan) and the girl Xiuxiu (Xu Jinglei) fell in love with each other. Soon, Xiuxiu returned to Japan as an orphan of World War II and has never been heard from since. Tietou, who missed Xiuxiu, sneaked to Japan and took refuge with his fellow countryman Ajie (Daniel Wu), and lived a fearful life as an illegal worker with a group of Chinese illegal immigrants. At this time, Xiuxiu had changed her name to Yuko and married Wakato Eguchi Toshinari (Masaya Kato) of the Japanese gang Sanhehui. Tietou, who saw this scene with his own eyes, was disheartened and determined to make money by all means and stay in Japan. Their means of making money soon touched the interests of the Tainan Gang, which eventually led to Ajie's right hand being cut off. Tietou followed the boss of the Tainan Gang, Gao Jie (Gao Jie), and accidentally learned of a conspiracy of interest vendetta by the underworld. He and a group of friends were inevitably involved in it...