Ace, who became the winner of the Desire Grand Prix, the "Deza Shin", has gotten his ideal world. Meanwhile, Keiwa receives a Rider Core ID as well as a Desire Driver and is invited into the Desire Grand Prix. As he cautiously equips his new gear, he is suddenly transported into the hall of the Desire Temple. There, he finds Neon, Michinaga, and Ace. As various young men and women gather, they are about to participate in a new game that's just about to begin... (Source: kamenrider.fandom.com)