A fiery young boy named Yudai Katsushi has a goal to become the greatest duelist of all time and participates in local tournaments to live his dreams. Although he is a regional champion, he is overlooked because he only enters tournaments close to home. But elsewhere, a dark cloud is spreading and a sinister organization from the past is reborn from the ashes with an ambitious group of thugs out to dominate the human race using powerful Shadow Cards! Little does Yudai know that he will find himself striving to become the best duelist in the land and saving the world as well!