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?