In Elphame, where every Crow Taken faces slavery and certain death at the hands of Fae, Perdi is the first to survive and the last to be Taken. Cut off from the mortal realm, the horn of Elphame sounds for only her. An oath breaker has been named, and the call has tasked Perdi with hunting down the truth before wild magic decides the fate of them all. It rests on Perdi’s shoulders to save herself, her people and the man she loves from an unstoppable power—the Caller of Crows.