Three young pilots connected by the Getter Rays (Ryoma Nagare, Hayato Jin, and Musashi Tomoe) are recruited by Dr. Saotome to fight the Devolved beings appearing from spatial distortions using the only weapon that can face these monsters, the Getter Robo. The Saotome Institute however holds a dangerous secret, a fragment of the being called Emperor which connects the Getter and its pilots to parallel worlds, including the presence of people from those worlds such as an older Hayato and Dr. Shikishima.