Brothers Kurt and Eric Sloan travel to Thailand, the homeland of kickboxing, to prove to the local fighters that the American school has superiority over the Thai one. Eric, the American kickboxing champion, faces Tong Po, the Thai champion, in a fight. Tong Po turns out to be a real beast. He deliberately maims the already weakened Eric Sloan, condemning him to disability. Kurt enrolls in training with Zen, a master of Thai wrestling, to defeat Tong Po and avenge his paralyzed brother.