Tatsuo Endou

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.

Minato Shindo has savant syndrome. His memory is amazing, but he has difficulty communicating with other people. When Minato was little, he dreamed of becoming a doctor. He met Doctor Akira Shiga and he wanted to become a pediatric surgeon. Akira was surprised by the 7-year-old's memory of the human organs and he decided to support Minato in achieving his dream. Eventually, Minato graduated from medical school and passed the national exam for medical practitioners. Now, Akira works as a director at a large hospital. He suggests to Minato to work in the pediatric surgery department at the hospital where he works.

A Jonan Station detective, Kikuchi, is framed for smuggling drugs and sent to prison. When he is paroled, he joins a private detective agency, where he is asked to investigate Mitsue Takazawa, the wife of a local trading firm president. While secretly conducting his own research, he finds out that Takazawa's husband is the one, responsible for Kikuchi's imprisonment, who also have set sights on Setsuko, a woman Kikuchi becomes romantically involved with.