The action moves underground as the tournament continues. Bandit Keith, the cutthroat American gamer, drags Jonouchi into the corpse-filled catabombs for a match with "Ghost" Kozuka, master of the undead. Trapped in the tunnels bneath Duelist Kingdom, Yugi and Jonouchi must conquer the maze of the Meikyui Brothers in a two-on-two duel. It's monster vs. monster in the endless maze of tiny passages...and waiting in the Meikyu Brothers' decks is the Gate Guardian, lord of the underworld, one of the most powerful monsters of all.