As peace returns to Heartland City following the World Duel Carnival, Astral, who has collected 50 of the 100 original Number cards at this point, receives a strange vision from within Yuma's key. Meanwhile, an emissary sent by Dumon from the Barian World, named Girag, arrives in Heartland City, and brainwashes a gang of bikers to follow under him, using the spell card Rank-Up-Magic Barian's Force. His appearance revokes a reaction from Shark's sister, Rio. As Yuma, Shark and Tori go to check up on Rio, she utters something about someone planning to take something important, reminding Yuma of…