Deep below the surface of the earth, deeper even then the belly of hell, the citizens of Trollsville are in a state of emergency. A massive earthquake just ripped open a passage from the earth's crust all the way to Trollsville. The elders of Trollsville quickly call a meeting to discuss the impending danger of an invasion of surface creatures. Armed only with an incredible tolerance for pain and rock-solid craniums, Grag and Thog make their way to Surfaceville...