Kurt Sloane is the cornerman for his brother Eric Sloane, the United States kickboxing world champion. After another successful title defense, Eric is enticed by the media to compete in Thailand, where kickboxing was started, to further establish his...

Kurt Sloane is the cornerman for his brother Eric Sloane, the United States kickboxing world champion. After another successful title defense, Eric is enticed by the media to compete in Thailand, where kickboxing was started, to further establish his legacy. Eric and Kurt travel to Bangkok where they are matched against Tong Po, Thailand's undefeated top fighter. As a result of Tong Po's brutal assault, Kurt is told that Eric is paralyzed from the waist down and will never be able to walk, let alone fight, again. Enraged, Kurt vows to avenge his brother. He is told about Xian Chow, a famous local trainer living in a remote area of Thailand. Although reluctant at first, Xian agrees to train Kurt in the art of Muay Thai (Thai boxing).