In the battle between good and evil, humans don’t stand a chance on their own. But for every living soul, there is a Firn: a spirit assigned to guide and defend humans from demonic beings like the Aropfain. Earning a place in the fight requires several lifetimes of service, experience, and sacrifice. After her most recent life as a martyr in ancient Rome, Anaya is only one step from achieving that goal. If she succeeds, she might become the Firn with the most important mission: guiding the human who will save the world—or end it. But when Anaya is paired with the notoriously difficult Jordin, her chances of success dwindle. Jordin isn’t like other souls. He’s strong, volatile, and a prime target for the Aropfain. It isn’t long before he falls for an Aropfain ploy that could jeopardize his chances of becoming a Firn and endanger the entire world. Only Anaya, as his partner, can save him. Will she succeed, or will she fail and take humanity with her?