Feira is no longer the simple mortal girl she was in the lands of humans. Here, in Prithian, she gained immortality, developed magical abilities, her beloved is the High Ruler of the Court of Spring, and soon their wedding will take place. But once, she made a bargain with the Ruler of the Court of Night and is obliged to spend one week each month in the neighboring domains—domains with an ill reputation. Meanwhile, the ruler of the Sleep Kingdom, a long-time enemy of Prithian and the world of humans, is preparing an invasion of their lands. In his hands is a powerful artifact that once gave life to the whole world and can raise the dead. Only the Book of Breaths can withstand its power, and Feira does everything—possible and impossible—to get the Book.