In postwar Japan, a traumatized former fighter pilot joins the civilian effort to fight off a massive nuclear-enhanced monster attacking their shores.

Hongo Takeshi awakens to discover he has been transformed into a grasshopper-hybrid cyborg. Becoming the Masked Rider, he must fight the mysterious evil organization SHOCKER to protect all of mankind.

Seeking change, Mitsuhashi and Ito attempt to reinvent themselves at their new high school as fearless bad boys, catching the ire of campus thugs.