At the beginning of the 21st century, scientists found that with new computers and super alloys, they could build an even bigger, faster Gigantor. They built the new Gigantor.

Shotaro is a young boy whose scientist father created the giant robot Tetsujin 28 after realizing the chances of attacks from outer galaxies. Shotaro has possession of the only controller, kept in an attaché case, which enables him to have direct command of the all mighty Tetsujin 28.—jackpittorino-6-215401