When kickboxing champ Eric Sloane is crippled in the ring by the evil Tong Po, Eric's younger brother, Kurt (Jean-Claude Van Damme), seeks vengeance. But if he's to vanquish Po, Kurt must first learn a martial art known as Muay Thai, so he seeks out the expertise of fight guru Xian Chow. Thanks to Chow's unconventional training methods, Kurt becomes an expert kickboxer. But is "the muscles from Brussels" good enough to defeat Tong Po?