Kahn is a heavy weight kick-box champion, who often kills his opponents in front of the running camera, to sell it on video tape. Jake had to witness once how his brother was killed by him, and now has come for revenge. But first he has to improve his fighting skills; he asks Phang, the only person in the whole world who ever had Khan down on his back, to train him until he is a match for him.

After thief Alex Cardo gets caught while stealing an ancient katana in East Asia, he soon finds himself imprisoned and beaten up by the crowd there. Especially one of the guards, Demien, feels upset by Alex appearance and tortures him as often as he gets the opportunity. Alex finds one friend and mentor in the jailhouse, Master Sun, who teaches him a superior fighting style called Iron Hand. When a 'best of the best kumite' is to take place, Demien gets an invitation. Now Master Sun and Alex need to find a way to let Alex take part in the kumite too.