Ashleigh Starr, known as Ash to all but one, carries a dark secret, punishable by a fate worse than death. In an apocalyptic world where humanity has been invaded by a new virus for years, Ash bears the burden of a forbidden love on her shoulders, the forbidden love of one of the Infected, those her people call the Fleshers. Fleshers -- unclean beings who are believed to be cursed and punished by their desire to feed on human flesh and blood. Ash spends her days exploring in the abandoned city outside the walls of her village and gathering bandages for the man she loves, the man who becomes a flesher at night only to return to human form at morning. Her only protection from the laws of her village comes from her ability to keep Garrett a secret in her home and from her blood, which is immune to the fleshers' bite and blood. But the day Ash is given a treatment for Garrett is when their secret love is threatened by the future leader of her village. With two newfound visitors from the outside, Ash and Garrett escape into the land of the undead seeking a way to turn their treatment into a cure.
But they are pursued by Lucius, the bloodthirsty future leader, who vows to have his revenge on Garrett for past wounds. And he won't stop until he's killed Ash and felt her immune blood on his hands.