Yugi and his friends are in awe over Grandpa's collection of Duel Monsters cards, but when #1 ranked Duelist and ruthless tycoon Kaiba kidnaps Grandpa to get the rare Blue-Eyes White Dragon card, Yugi must face Kaiba.
Yugi and friends take a break from honing their card playing skills to watch Insector Haga and Dinosaur Ryuzaki compete in the Duel Monsters Regional Championship.
Yugi gives up one of his own star chips so Jonouchi can board the boat bound for Duelist Kingdom and duel to save his sister's eyesight. Anzu and Honda stowaway to join the two.
After Yugi defeats Haga's first wave of Duel Monsters, he's shocked to discover that Haga has one last trick up his sleeve; a ravenous Great Moth that grows in power with every turn.
The fisherman duelist Mako, the master of the Sea Deck, baits Yugi into a duel on his own Sea playing field for a home field advantage. Can Yugi adapt to these new settings to turn the tide of battle?
Yugi hears of a duelist who was kicked out of the tournament and his card deck and chips were stolen so Yugi tracks the thief down, and finds out it is Mokuba Kaiba.
