Ever since her brother Razo introduced her to the trees, Rin has turned to them for peace or reassurance, even direction--that is, until the day they seem to reject her. Rin is sure something is wrong with her, something that is keeping her from feeling at home in the Foreat, from trusting herself with anyone at all.

Determined to find a new sense of self, Rin accompanies Razo into the city, where she discovers that a mysterious threat haunts Bayern. She joins with three magical girls--Isi, Enna, and Dasha--as they venture toward the kingdom of Kel . . . where someone wants them dead.

The fourth book in master storyteller Shannon Hale's beloved Books of Bayern series is equal parts fantastical and thrilling, with unforgettable characters to root for at its center.