my review =)

A teenager teams up with the daughter of young adult horror author R. L. Stine after the writer's imaginary demons are set free on the town of Madison, Delaware.

When her father unexpectedly passes away, young Ella finds herself at the mercy of her cruel stepmother and her scheming step-sisters. Never one to give up hope, Ella's fortunes begin to change after meeting a dashing stranger.

Gaim is taken into a new version of Zawame, where soccer teams aim to win the All Rider Cup. The reward: The Golden Fruit. Along with the City restored and the immense soccer popularity, he sees many things different from his world, such as Hase and especially Yuya still alive in this world. Though questioning why this is happening, there is a secret about the world. A strange man named Kougane starts sending locusts to other armored riders, consuming them, leaving their lockseeds intact in order to revive his Golden Lockseed, which in turn transforms him into Armored Rider Mars. Along with a strange youth named Lapis who seems to be in relation of the new world, will the Beat Riders be able to stop him?

The film opens with Zawame City ravaged by a fight between the Heisei Riders and the Shōwa Riders, before going back in time to the week before, when workers from the Yggdrasill Corporation are dragged by an unknown force to underground. Upon hearing rumors about it, Kouta Kazuraba investigates the area with his friend Mai Takatsukasa, just to fall into a hole as well and find themselves in an underground, alternate version of the city. The two find a boy called Shu, who has the power to revert things and is certain that he has something important to do, but he does not remember what it is. Kouta and Mai then bring the boy to the surface and Takeshi Hongo appears demanding them to hand him over, when soldiers from the Underground Badan Empire appear to kidnap him as well and Takeshi transforms into Kamen Rider 1 to allow Kouta, Mai, and Shu to escape. Badan then launches an attack on the surface, and Armored Riders Baron, Ryugen, and Zangetsu Shin appear to fight back alongside Kouta, who transforms into Armored Rider Gaim as well to protect his friends. However, Gaim is attacked by Kamen Rider Fifteen, who is also seeking the boy and also possesses a Lockseed that allows him to transform into the Rider Arms of the 15 Heisei Riders, and when Kamen Riders 1, 2, and V3 appear to fight him, Shu uses his powers to escape with Gaim and Mai.