Twenty years after being turned into a werewolf, hunter Ileana returns home under the shadow of a looming supernatural war to investigate her sister's disappearance.

In the wake of a devastating attack by a rogue coven of vampires, hunter-turned-werewolf Ileana returns to the ruins of her family home. Compelled by the belief that her sister, Tamara, survived the attack, Ileana seeks the help of Liviu, the werewolf who turned her, and Evdochia, a hauntingly powerful vampire descended from Vlad Țepeș himself.

The group discovers that the attack is the first strike in a looming war that threatens the fragile truce between humans and mythical nightwalkers. With time slipping away and danger closing in from all sides, Ileana and her allies must race to find Ravenswatch, the ancient fortress where the coven is gathering its strength for another attack.