While stopped at a roadside phone booth for transmitting his work through the Internet to the university, Professor Hideki Satomi finds a scrap of newspaper with the picture of his five-year-old daughter Nana in the obituary section.
Takeshi Hongo 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 organization planning to dominate the world. After being remodeled into a cyborg, Takeshi escapes and swears to protect the world from the inhuman monsters.
