After an invasion by merciless enemies, the world is nearing apocalypse. A veteran Getter Robo pilot, Hayato Jin, has created the Getter Arc to combat the onslaught. The new unit is based on Professor Saotome's ultimate creation and serves as a hope for humanity. Joined by Takuma, Ryouma's son and half-human half-Saurian Kamui, as well as Baku, younger brother of famed ESPer Tahir, the team sets out to restore peace to their war-torn world by taking on the invading forces with the Getter Arc.