The fates of an angel's daughter, a reformed gargoyle and an unrepentant incubus are bound together in a city where a deadly demon is rising. Abby Stone, a night-shift nurse with healing powers and a secret demon-hunting habit, has been saving victims of demons and their cults ever since she left home to search for her father-an angel turned to stone and trapped in the mystical hotspot of Meridian. As Abby starts making an unwelcome name for herself in all the local demon haunts, she crosses paths with earnest ex-demon Zekiel, a gargoyle who fights against evil for his redemption, and charming incubus Charles, who calls her nephil offspring-daughter of an angel who has fallen. Charles' attempts to convince her that she's meant to be a demon confuse and infuriate her, but now that an incubus has set his sights on Abby, there's no denying how tempting he is-and how dangerous. In the meantime, with a demon prince's ascension rattling the city of stone and chains, Abby could stand for things to be a little less interesting.