It's back to Perfection, NV, for munitions-crazed Graboid hunter Burt Gummer (Michael Gross), who has made a career out of chasing and slaying the burrowing "sub-terrestrial" creatures that pop out of the ground and eat whomever happens to be standing there. Gummer and company have their hands full this time, when the oversized worms have mutated to a new state -- not only do they burrow, but they have wings and can fly like carnivorous dragons.