As Ren tries to learn about Yui's past, Miyuki felt time is running short when Shiro targets him for death for disobeying his desires for the Rider Fight. In the meantime, Takeshi kidnaps Goro to force Shuichi to fight him face to face.

Ren battles with Shuichi in the Mirror World to decide who will survive. Miyuki reveals his past to Shinji as he contemplates the costs of changing destiny, as Shiro orders Takeshi to eliminate Raia for his refusal to fight. In the meantime, Reiko goes out to investigate Takeshi's disappearance.