Thief Alex Cardo was caught stealing an ancient samurai sword in East Asia and soon found himself imprisoned there, beaten by the crowd. Especially one of the defenders, Demin, felt uneasy about Alex's appearance and tortured him whenever he had the opportunity. Alex found a friend and mentor in prison, Master Sun, who taught him an advanced fighting style called Iron Hand. When the 'best kumite' occurs, Demien will receive an invitation. Now Sun and Alex need to find a way to get Alex to participate in the competition as well.