By releasing the forbidden book that shakes the world, which was stored in the forbidden land, Agastia Base, the boundary between "reality" and "story" becomes ambiguous, causing the real world to collapse! Meanwhile, Touma and the others form a group to save the endangered worlds, which leads to an encounter with a mysterious boy (played by Fuku Suzuki), who holds a key role to the story.
Celebrating Kamen Rider's 50th anniversary and Super Sentai's 45th anniversary, the film is directed by tokusatsu veteran Ryuta Tasaki (Gamera the Brave, Kamen Rider 555: Paradise Lost), written by Nobuhiro Mouri (Kamen Rider Gaim), is produced by Kikai Sentai Zenkaiger and long time Heisei Kamen Rider producer Shinichiro Shirakura (Kamen Rider Agito, Kamen Rider Den-O). Kamen Rider Saber + Kikai Sentai Zenkaiger: Superhero Senki is set to premiere this July 22nd.