Warren lives a life of relative ease, doing the same thing every day with his cousin Dietrich. That is until a catastrophic event causes the entirety of their walled-in civilization to be forced to adapt to the oncoming unworldly threat. Rather than being the hopeful hero, Warren and his cousin join the military purely for the sake of stability, but they have severely underestimated the sheer horror and ferocity of those that hunt and prey upon humanity.