The protagonist, Joe Kirifuda, is a fourth-grade elementary school student who loves drawing and Duel Masters. Together with Decky, a "talking deck case" that has the ability to create creatures, he forms his partner "Jokers" and takes on duels against rivals! One day, Joe accidentally wanders into one of the creature worlds, the "Nature Civilization" world. There, he witnesses the Four Heavenly Kings of Creatures fighting against an invasion from an unseen threat—the "Dark Civilization." After causing trouble in the Nature Civilization world, Joe is mistaken for an enemy by the Four Heavenly Kings and ends up battling them in a duel...!? A new story for Joe unfolds on the stage of the Nature Civilization!!