In this episode, Yugi decides to go to Duelist Kingdom, and we get introduced to Joey's sister, Serenity. We also see the gang board the ship to Deulist Kingdom, either by boarding directly or by sneaking on (in the case of Tea and Tristan). Once on board, we meet Mai Valentine, and Weevil throws Yugi's Exodia cards overboard. After Joey jumps in after the cards, and is subsequently saved by Yugi, the ship arrives at Duelist Kingdom.