Armstrong High School has become the center of strange happenings, and things only get stranger when the bad boy-styled transfer student Jason Knight attempts to make friends in his way, reuniting with childhood friend and self-professed travel vlogger Charlene Jordan, all while gaining the ire of loner Kenny Allen. When the campus becomes overrun with monstrous constructs called Zodiarts, Kenny, and Charlene attempt to use the strange devices they have found in the Rabbit Hatch lunar base that they access through a locker in an off-limits part of campus to fight them. However, Jason interferes in their plans, in part due to Kenny's body being unable to handle the strains of battle, and uses the devices to transform into Fourze. Upon learning of other heroes called Kamen Riders, Jason creates the Kamen Rider Club whose membership includes Charlene, Kenny, the school's queen bee Mia Kahn, Mia's jock boyfriend Shane Decker, garishly styled social butterfly JK and goth girl Taylor Nichols. Later joined by Rowan Sanders, another transfer student who transforms into Kamen Rider Meteor, and their teacher Mr. Charlie Overton, the Kamen Rider Club and Kamen Rider Fourze learn of the Horoscopes, an evolved group of Zodiarts who have been orchestrating events on the school grounds to build up their ranks. As the battle escalates, the Horoscopes set their motions to the final phase of their master plan before Kenny discovers his true existence.
