As the world teeters on the edge of destruction from an invasion, Hayato Jin, an original pilot of Getter Robo, unveils Getter Arc, a powerful new robot created from Professor Saotome's final masterpiece. Joining forces with Takuma, the son of his former co-pilot Ryouma, Kamui, who is part-human and part-Saurian, and Baku, the sibling of the remarkable ESPer Tahir, they embark on a mission aboard Getter Arc to battle the merciless invaders and bring light back to their war-torn planet.