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With Dartz finally defeated, Yugi and his friends are taking a well-deserved break. But it doesn't last long, as everyone realizes that they have no way to get back to Domino City. Luckily, Mokuba arrives to say that if they participate in Kaiba Corporation’s new tournament, they'll get a free ride home. Yugi, Joey, and Rebecca each receive their formal invitations and Mokuba and Roland fly the gang to Kaiba Land. There, they enter the Kaiba Dome, where there's a huge dueling arena where duelists can challenge an expert duel computer.
In the dome, Yugi and his friends meet Leon Wilson, a boy who has idolized Yugi since he won Duelist Kingdom, and Rick, a boy with an unbalanced deck consisting of mostly Dragon cards. Yugi gives him one of his Magic cards, and Rick decides to challenge the duel computer. But right when he does, a mysterious man hacks into Kaiba Corporation’s computer system and shuts and locks all the doors out of the main arena, and programs the duel computer to not open the doors unless someone defeats the duel computer. Rick has no chance to defeat the computer on its highest setting, so Yugi quickly changes to Yami Yugi and jumps into the arena to help, but can even the King of Games win with an unbalanced and weak deck?