Bloodsport is the story of American man Frank Dux who has spent most of his life being trained by Tanaka, Japanese master of the art. He took this training to participate in the Kumite, the ultimate martial arts tournament, where participants are seriously injured, even killed. Story set ups when Frank decides to participate in the tournament despite being refused by his superiors, as they need him. Two army officers followed him to Hong Kong but Frank escapes from them. Despite knowing the fact that he may have to face Chong Li, the defending champion who has killed a few participants, he still decides to participate in the championship.