Six giant vehicular beings called Engines chase down three Pollution Ministers' from the Barbaric Machine Clan Gaiark from the Engine's home world to Earth. The six Engines manage to pursue them, selecting five humans to become their partners, the Go-ongers. The team are joined by Go-on Wings and their Wing Engines, as well as the Ancient Engines, as they all together battle the Gaiark as well as other evil villains from other Braneworlds.