Machine World is one of the 11 Braneworlds other than our own,the Human World. Machine World is home to giant vehicular beings called Engines who wage a war against the Gaiark, who desire to pollute their world. Losing the war Gaiark's three Pollution Ministers' escape to Earth. Viewing the Human World as an easier target to create their ideal paradise. 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.