When darkness falls over Union City, a group of teenagers are chosen to fight against chaos brought on by the world's imbalance by using yo kwon do, an ancient fighting style that combines martial arts with yo-yo trickery.
As a mysterious 'darkness' rises, a group of heroic teens is assembled to harness the awesome mystical power of YO KWON DO, a practice that defeats evil by blending the skill of yo-yo with the martial art of Kung Fu.
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