The "Desire Grand Prix" is a game to protect the peace of the city from the threat of the mysterious enemy "Jyamato", whose origin and purpose are unknown. Each participant transforms into a Kamen Rider and competes to win the game by defeating enemies and saving people. The winner of the Desire Grand Prix will be rewarded with "the right to bring an ideal world to life" as a prize. In other words, only the true heroes who win the competition will be able to realize the world they have wished for.

《Geats VS Revice VS 龙骑》冲击性的战斗现在开始。
作为假面骑士Revice“最后的故事”开始的第1部、Geats×Revice×龙骑的联动。
等待着被邀请参加Desire Grand Prix的浮世英寿们的是、被何人改变制作的新游戏「Desire Royale」。
暗中活动的谜之游戏管理员的策略，假面骑士之间的大激战！
谜之假面骑士登场、前所未有的混战游戏开幕……！
激战正酣，谁将成为最后赢家——然后赢家想要实现的愿望是什么。