女友梅芬在努尔与黑帮发生冲突时意外死亡，这成了努尔内心深处一直难以忘怀的伤痛。梅芬的妹妹琳在中国习武学成归来挽救父亲的剧团，她一直误以为是努尔害死了姐姐。努尔也在爷爷的教导下苦习泰拳，二人分别代表的中国武术与泰拳在片中擦出了别样的火花。然而黑帮频频找麻烦令二人及身边的亲人都身处险境，他们能否得救？藏在内心深处多年的秘密又能否得以释怀？
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