Two best friends in college Mitch and Elizabeth make a pact that if in ten years after graduation they are both not married they will marry each other. Ten years later Mitch (still single) finds out Elizabeth never got married so he decides to travel across the country, find her and follow through on their pact. What he soon realizes is it wont be a simple as he thought.

Hick handymen Val McKee and Earl Bassett can barely eke out a living in the Nevada hamlet of Perfection, so they decide to leave town — despite an admonition from a shapely seismology coed who’s picking up odd readings on her equipment. Before long, Val and Earl discover what’s responsible for those readings: 30-foot-long carnivorous worms with a proclivity for sucking their prey underground.