When aspiring duelist Yuma meets Astral, a mysterious visitor from another world, it seems like the perfect match: While Yuma requires Astral's dueling expertise, Astral needs Yuma to gather 99 Number Cards that contain his lost memories. They would be dueling’s greatest tag team…. if they could only get along! With Yuma's victory in the World Duel Carnival, peace has returned to Heartland City… but it’s short-lived! The sinister leaders of Barian World are invading Earth to take down Yuma and Astral and steal all their Numbers! Can our dueling duo defeat the galaxy’s most powerful foes? Or is victory just not in the cards?