Yuna Hoshino

When the new season of Desire Grand Prix, the survival game tournament that can realize the world according to the winner's desire, is suddenly taken over by a mysterious force, Kamen Rider Geats and the regular players all get caught up in a series of cruel games, facing head-to-head with a group of new players of Kamen Rider Revice and other legendary Kamen Riders.

A sleeping Michinaga is waken up by Ace who informs him of the current Desire Grand Prix round. Present with them are Keiwa, Neon, and Tsumuri. As Michinaga resolves to win this round, Tsumuri announces that the first round is Dance Battle with all the male participant's outfits changed into a retro look, much to Michinaga's bewilderment.

Has the world suddenly split into four? Keiwa Sakurai, Neon Kurama, Michinaga Azuma, and Tsumuri are flung into different worlds. And for some reason, a different Ace exists in each of the four worlds. The cause seems to be from the "World Doomsday Game" started by the staff from the future. In light of this crisis, the mysterious Cross Geats appears. Just what will happen to Ace and his friends?

A sinister Ace transforms into Kamen Rider Dooms Geats, clashing with allies. Beroba, another Ace, awakens Michinaga's might. The Riders unravel the enigma surrounding the two Aces to thwart the God of Destruction's advent.