"I'll fight to protect everyone's smile!" After the awakening of a mysterious figure on the ruins of Kurogatake, Nagano, several "Unidentified Lifeforms" appeared in Tokyo and started a wave of mass murders. Kaoru Ichijo, an investigator for the police department, meets young idealist Yusuke Godai and his friend, Sakurano Sawatari, who is kidnapped by one of these strange creatures. To save her, Godai accepts the power given to him by an enigmatic spirit wrapped on bandages. By accepting its power, he transforms and becomes... Kamen Rider!