Reyna lives in a well-to-do city of unending daytime, born with the ability to heal other people’s ailments. However, her ability has its limits, and she leaves the safety of all she’s ever known to become stronger. Upon leaving the comfort of home and walking into an active war zone, Reyna discovers how little she knows about herself and the world, experiencing nighttime for the first time, and the tragedy of gaining all the power she’s ever wanted.