Jinho is frustrated by the limitations of his traditional tae kwon do training, so when he is scouted by a trainer from an underground mixed martial arts club, the prospect of fighting without boundaries is pretty exciting.

    But the more involved he gets, the more disturbing he finds it and the harder it is to find a way out. Underground MMA is a free-for-all: no weight classes and no referees to stop the fight if it goes too far.

    When Jinho is set up to fight an opponent known as The Ripper, he realizes that he doesn’t belong in this world, but the only thing that can save him is the ancient code of tae kwon do.