David's brother, Kurt, defeats Po in Karate Tiger 3 - Der Kickboxer (1989). A year after Po kills Kurt, David, who has a kickboxing gym in LA, is manipulated into a match against Po.

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

Kurt Sloane must learn the ancient kick boxing art of Muay Thai in order to avenge his brother.