Machine World is one of the 11 Braneworlds other than our own, which is referred to as the Human World, and it is home to giant vehicular beings called Engines who wage a war against the Gaiark who desire to pollute their world. Losing, Gaiark's three Pollution Ministers' escape leaves them on Earth, seeing the Human World as an easier location to create their ideal paradise. The six Engines manage to pursue
