In a secret underground location in the mountains of Austin, Texas, a covert group of CIA operatives known as "the Exterminators" raids a maximum-security laboratory called UMCELL to kill all the scientists who were part of the government's ultra-secret project known as ZALFA. Accidentally, and not according to their plans, they release a abominable virus that spreads uncontrollably throughout the planet. The infected, despite their appearance as the living dead, are extremely dangerous, and their only goal is to annihilate anything that moves in front of them. The protagonist of this story is 38-year-old virologist Luke Brown, who lives with his family in the small town of College City near Austin, Texas. He will be caught up in a thrilling story from beginning to end when the apocalypse is unleashed upon the earth...