The villain is a sequel to Boxing, with the background transferred from Thailand to Tokyo. The strong man (Chen Xing), who was subdued by Jiang David's brothers, escaped from prison in Thailand, killing Dillon's mother and captive his fiancee Jing Li. The strongman came to Hong Kong to seek revenge and assassinated the gatekeeper of David Jiang's martial arts school several times in disguise. There is also a boss behind the strong man. Jing Li is in his hands, and David Jiang and others are forced to go to Japan for negotiations.