Yu-Gi-Oh! Zexal focuses on Yuma Tsukumo, a youngster who aspires to become the duelist champion, but usually gets himself in trouble, due to his reckless nature. Something unexpected happens when he challenges Ryoga Kamishiro to a duel. During the duel the mysterious ghost of Astral appears before him and tells Yuma that his mission is to search for his lost memories, that were scattered across the world taking the form of 99 Exceed monsters called "Numbers", and to retrieve them, he must defeat the owners of each Number monster in a duel.But what is Astral's true purpose for appearing here? And what are those new monsters known as "Number Monsters"? A series of mysterious powerful rivals begin to appear before Yuma and Astral, which begins to explain the mystery... With this combination, the curtain on a new Dueling Legend is about to rise on the world!