The Machine World is a another reality other than our own in which exists giant vehicular beings called Engines. The Engines waged a war against the Gaiarc, who desire to pollute their world. Losing, the Gaiarc escape through time and space to enter our world for a more easy location to create their ideal paradise. Three of the Engines manage to pursue them, selecting three humans to become their partners, the Go-ongers. The team are joined by two more Go-ongers chosen by two Engines who manage to enter the human world as well.