Eighteen year old Cassidy Larken is navigating life after the death of her grandmother, Charlotte, the only family member she had ever known. In an attempt to stay connected with Charlotte, Cassie begins unearthing details of her grandmother's past, uncovering secrets she cannot at first fathom. After discovering a hidden door, she and her loyal friend, Emily, are transported to the magical kingdom of Lark's Valley. There, they quickly learn humans are the minority in a land ruled by a tyrannical Faerie Queen whose reign will only end when Cassie brings a long-buried truth to light.

With the help of a talented Green Witch, a powerful Alchemist and a handsome half-Faerie warrior, Cassie exhumes the truth about an old prophecy, fulfills her destined role, and reclaims the life that was stolen from her.