With the human population ravaged by a series of devastating plagues, the alien Chtorr arrive to begin the final phase of their invasion. Even as many on Earth deny their existence, the giant wormlike carnivores prepare the world for the ultimate violation--the enslavement of humanity for food!

As tenacious aliens transform the war torn Earth into a replica of their own terrifying world, a handful of scientists, soldiers, and citizens prepares to fight back.