As Trey and Quattro's crests protect them from having their Numbers taken, they are teleported away by Vetrix before Quinton appears and returns Hart, who has fallen into a coma after giving Kite his power. He then proceeds to tell Yuma that his father, Kazuma, is alive in the Astral World before disappearing. Yuma becomes conflicted as to whether he should collect Numbers to either restore Astral's memories and learn about Kazuma's whereabouts or help cure Hart's illness. Yuma prepares to leave home in search of his father and wants to quit dueling, but is stopped by Roku, who challenges Yuma to a duel in order to remind him about his love of dueling. Meanwhile, as Vetrix begins to experiment with the power he had managed to take from Hart, Roku tells Yuma about Mr. Heartland and Dr. Faker and how they relate to Kazuma.