As Nesbitt (in Tristan's body) kidnaps Mokuba, Kaiba is forced to duel Leichter, the former assistant to his stepfather. For Leichter, the duel is personal, as he plans to take what he believes is rightfully his—KaibaCorp. Meanwhile, Tristan rejoins the group; his friends do not recognize him, since his mind has been downloaded into a mechanical monkey.