Mediator Ayala Storme kills demons by night and handles PR by day. She avoids Mediator luncheons and a fellow Mediator who's been trying to get in her pants for years. She does her job. She keeps her sword clean and her body count high.

But when a rash of disappearances leads her to discover that Nashville's hellkin are spawning a new race of monster on human hosts, Ayala will be the first line of defense against these day-walking killers.

That is, until one of them saves her life.

Dodging the Mediators and the demons alike, Ayala's new knowledge of the hybrids' free will challenges everything she's ever known about her job. Racing the clock and trying to outrun her comrades and enemies alike, she's not sure who will catch her first…