In the wake of the disaster that concluded Shin Getter Robo, Hayato Jin has assumed leadership of the Saotome Research Institute, while Ryoma has retired to the countryside. Although robot technology has progressed to the extent that most major nations own such machines, research into Getter Rays is now prohibited and concealed from the rest of the world. To defeat the madman Randou, whose base is located in the Arctic, a new team of Getter Robo pilots is assembled, operating a new variant of Getter Robo powered by simple plasma energy. By allying with the militaries of various nations, the war against Randou's army commences. This series marks the debut of Shin Getter Robo.