Man Kato

Dormant, experimental cells begin to awaken inside their human hosts, turning them into creatures called 'Amazons'. Two Amazons-Jin Takayama and Haruka Mizusawa-transform into Kamen Riders Alpha and Omega, aiming to exterminate the growing threat.

Hongo Takeshi is a promising young man with a passion for motorcycle racing. However, his dreams are suddenly ruined when he gets kidnapped by Shocker, the evil secret organisation planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.