When the Dinosaur Kingdom emerges from the depths of the Earth with their fleet of mechanical dinosaurs to dominate the world, the Saotome Research Institute scrambles to deploy the powerful Getter Robo after their initial prototype fails. With a shortage of pilots, Ryo Nagare recruits the skilled martial artist Musashi Tomoe and the lone wolf Hayato Jin from his college to operate the Getter Machines and defend humanity against this menacing invasion.