What would you do to survive the demon apocalypse? Sixteen-year-old Rebecca Ashford and her younger sister, Errol, have spent the last year hidden in their family's tornado bunker after the demon apocalypse ravaged the world. When the sound of a screaming baby wakes them in the middle of the night, they attempt to save the infant but barely make it out alive. During the scuffle, Errol is poisoned by a demon and only has a week...