An Ex-French Soldier begins participating in underground street fights in order to make money for his brother's family.

When Karate champion Michael Rivers wins the last tournament of his career, shady businessman Ron Hall offers him the opportunity to fight in an illegal Kumite in Bulgaria against the world’s best martial artists. When Michael declines, Hall has his daughter kidnapped and, in order to rescue her, Rivers is left with no choice but to compete in the deadly tournament. Arriving in Bulgaria, he finds out that he is not the only fighter whose loved one was taken. Rivers enlists the help of trainers Master Loren, and Julie Jackson but will it be enough for him to win the tournament and save his daughter’s life?

U.S. soldier Frank Dux has come to Hong Kong to be accepted into the Kumite, a highly secret and extremely violent martial arts competition. While trying to gain access into the underground world of clandestine fighters, he also has to avoid military officers who consider him to be AWOL. After enduring a difficult training and beginning a romance with journalist Janice Kent, Frank is given the opportunity to fight. But can he survive?