With his grandfather's soul taken by Maximillion Pegasus, Yugi has little choice but accept his offer to take part in the Duelist Kingdom tournament. Determined not to let his friend go it alone, Joey offers to come too, hoping that he may be able to win the tournament himself in order to raise the money for his sister Serenity's eye operation. As the two set off for Duelist Kingdom they do not realise that Tea and Tristan have also stowed away on board, not wanting to miss out on the fun. However things turn sour when Weevil Underwood, the Regional Champion, uses dirty tactics to prevent Yugi from ever summoning Exodia again.