Invincible Robo Trider G7 portrays the attempted invasion by the Robot Empire to take over Earth. Rebelling against this, the scientist Nabalon, who was exiled from the Empire, meets the protagonist Watta's father, and together, they design the transforming robot Trider G7. However, Watta's father dies in an accident, and Watta has no choice but to succeed him at both his job and piloting Trider. As the president of the Takeo General Company, Watta must now fight to ensure everyone's happiness, as well as the condition of the company's funds.