Professor Daidōji has developed a gravity machine called the GX Device. Unfortunately, Shocker wants it; so they attack the professor and destroy his laboratory, but come home empty-handed. Shocker's agents find out that the plans for the GX Device are with Daidōji's daughter, who is celebrating her birthday. Now the Kamen Riders, along with FBI agent Kazuya Taki, must protect Daidōji's daughter and prevent Shocker from obtaining the plans.
Takeshi Sasaki
Hiroshi Fujioka
Akiji Kobayashi
Jirô Chiba
Hideyo Amamoto
Wakako Oki
Emily Takami
Yoko Sugibayashi
Yasuharu Miura
Hajime Izu
Hiroyuki Miya
Hiroko Saito
Mahito Tsujimura
Shinji Nakae