When American kickboxing champ Eric Sloane is crippled in the ring by the dastardly Tong Po, his younger brother Kurt (Jean-Claude Van Damme) vows revenge. But if he is to defeat 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 he good enough to defeat Tong Po?