Eric and Kurt Sloane are the descendants of a well-known Venice, California-based family of martial artists. Kurt has always been in older brother, Eric”s shadow, as he lacks the instincts needed to become a champion. Against Kurt”s concerns, Eric accepts a paid offer and travels to Thailand to challenge the Muay Thai champion Tong Po and fails with dire consequences. Kurt sets out for revenge. He trains with his brother”s mentor, Durand, for a Muay Thai fight against the merciless champion, Tong Po. Durand first thinks Kurt is impossible to train, but through a series of spiritual exercises and tests, Durand discovers that Kurt has a deeper strength that will carry him through his final showdown with Tong Po.
美国重量级搏击冠军艾瑞受邀前往泰国曼谷，与当地泰国拳击王唐波竞赛，谁知艾瑞一时掉以轻心，被唐波打得双腿残废，差点丧命。略懂搏击的克特为了替哥哥艾瑞报仇决定向当地武学大师西安学习泰拳。恶霸佛瑞迪是当地的大混混，经常任其手下骚扰当地居民，并要求居民缴交保护费，克特为了替西安侄女麦丽解围，与其手下大打出手，此事传到佛瑞迪耳中，为了解决新仇旧恨，佛瑞迪决定派出唐波依照古法与之打斗。不料，在打斗的前晚，艾瑞被佛瑞迪一帮人所挟持，为了拯救艾瑞的生命，克特硬着头皮上场，任唐波拳打脚踢。幸好，西安趁机解救艾瑞，克特最后以高超的拳法战胜唐波，替哥哥艾瑞出了一口气。