Yugi and friends take a break from honing their card playing skills to watch Weevil and Rex Raptor compete in the Duel Monsters Regional Championship. When Yugi opens a package from Duel Monsters creator, Maximillion Pegasus, Yugi is forced to face him in the mysterious Shadow Realm where all the monsters and magic are real. Yugi loses, and Pegasus claims Grandpa’s soul as his prize! Yugi must travel to the Duelist Kingdom and win Pegasus’s tournament if he is ever to see his Grandpa again!