Elisabeth, raised in a Great Library filled with magical grimoires, hopes to become a warden to protect the kingdom from their power. But when the library's most dangerous grimoire is released, she is implicated in the crime and forced to turn to her sworn enemy, Nathaniel Thorn, and his demonic servant. Together, they uncover a centuries-old conspiracy that could destroy the Great Libraries and the world. As Elisabeth's alliance with Nathaniel grows stronger, she begins to question everything she's been taught and discovers a power she never knew she had.