Military veteran Jake Hathaway is facing the beginning of a zombie outbreak, one that forces him to take lives and sees him wrongly convicted of murder. As he fights to prove his innocence, he also learns that he unknowingly played a role in the outbreak's origin. The world outside the prison descends into the chaos of a zombie plague. Jake, along with his friends Mack, Duy, and a Belgian Malinois named Roscoe, determine that they must put an end to this Infection Armageddon. What follows is a journey both exciting and horrific.