In a world where magic and mystery intertwine, the history of their world is defined by war, and war by the practitioners who fought it.
Ari's world has been shattered. The memories of the only person she has ever loved, a prince of the first five houses, have been ripped from her mind and heart. As a Mundane, she could never call him her own, but the loss still left a void that seemed impossible to fill. As a Sentinel-in-training, Ari is dedicated to protecting those who can't protect themselves, now finding herself balancing on the edge of a war between Light and Shadows. Her nights are plagued by vivid dreams of a spectral figure?a darkened Queen, the Harbinger of War?who will bring ruin to all worlds if not stopped.

Trapped in a relentless struggle to recover her lost memories, Ari's urgency grows as the world of magic teeters on the brink of annihilation. The answers she seeks are buried deep within her mind, obscured by a mysterious force. As the days pass, the stakes rise higher, and Ari realizes that if her nightmares become reality, she may singlehandedly bring about the end of all worlds.