The Monster That Challenged the World

Lieutenant John Twillinger thinks he's seen it all-until an earthquake under the Salton Sea unearths a horrifying nest of prehistoric killer crustaceans. Giant, terrifying and with hunger for human flesh, the beasts begin feeding on the locals, unleashing a shocking reign of murderous mollusk mayhem. Can Twillinger do anything to stop their spread? Or will the human race be forever left in the snails' slimy wake?