When Rachel Calloway witnesses her father's murder in a quiet city park, she expects chaos and grief, not for his body to vanish before help arrives. Everyone insists nothing happened. No attack. No blood. No man dying in her arms. The more Rachel pushes for answers, the more the world treats her like she's losing her mind.

Strange visions creep into her waking hours. A symbol follows her like a haunting. And a book older than she is opens at her touch, revealing a truth she was never meant to see.

When a mysterious stranger steps out of the shadows offering help, Rachel is torn between suspicion and the unexplainable pull she feels toward him. He knows things he shouldn't. Sees things she can't. And he swears her father's death is tied to a world she's never seen... and a power she was never supposed to awaken.

As the world bends and the line between myth and memory blurs, Rachel learns one thing with chilling certainty: Whatever waits on the other side has been waiting for her.