The day of the WDC finals comes, with finalists set to duel on a Duel Coaster for the knockout phase. However, Yuma ends up leaving the Heart Piece required to start the Duel Coaster at home. Tori and the others manage to get the piece to Yuma, though Tori trips and ends up going on the Duel Coaster with Yuma. As the other duelists progress, Yuma is challenged to a 3-on-1 duel against the Triad of Terror.