Ordinary life takes an extraordinary turn when MacKayla Lane's sister is mysteriously murdered, and a single, cryptic message is left behind. Journeying to Ireland for answers, Mac uncovers a shadowy realm where the line between good and evil is blurred, and mystical powers she never knew she possessed emerge. Amidst this dangerous new world of the Fae, she is shadowed by enigmatic figures—Jericho, whose intentions are as obscure as his past, and Vlane, an alpha Fae with a seductive power over humans. As realities collide and the veil between worlds weakens, Mac's race to find a powerful ancient book turns into a desperate struggle to control the fabric of both realms before they are irrevocably altered.