The book focuses on 16-year-old Gretchen, who is sent to Earth on a mission from her evil stepmother to save her stepsister, Ruby, who has been enchanted by the fairy prince of Britannia. This is a dangerous task for young Gretchen – no one who has visited Britannia has ever returned. And if she doesn’t bring back Ruby safe and sound, her evil stepmother will kill her beloved father. While in the forest, Gretchen meets a family of Bearfolk – those who can shift between human and bear forms. Young Arthur agrees to help Gretchen on her journey, and Arthur’s mother believes that Gretchen is the legendary Silverhair who has come to save the Bearfolk from the war with the fairies. But the real magic of the story is Gretchen and her fearlessness in doing what is right to save her family.