Shotaro and Terui are asked by a mother to save her daughter, who has been turned old to satisfy a grudge hit as Shroud approaches Phillip and Terui, wanting them to become Kamen Rider Double Cyclone Accel Xtreme.

Terui tries to decipher the truth regarding Shroud and her intentions as she tries to force him and Philip to join together into the ultimate Double to defeat Ryubee. Meanwhile, an agent of Foundation X takes possession of the new Gaia Memories…