A deadly hunter. A dark secret. A love worth breaking every vow for. On the isle of Grimhaven, a beast slumbers within elite hunter Olena, silenced only by a brutal ritual sacrifice. But this year, she went too far to impress the gods, awakening dark forces that threaten everyone she loves. And when her mother falls under a shadow curse, Olena's only hope is forbidden magic and an unlikely alliance with the man whose betrayal cut deeper than any blade-Valentyn. Her fiercest hunting partner and ex who destroyed her in ways she's still healing from. She should kill him on sight. Instead, she finds herself remembering stolen kisses beneath starlight and how he still looks at her like she's worth burning the isle for. Working together means confronting the secrets that tore them apart while hiding her own. It means pretending her traitorous heart doesn't still ache to be his. As ancient werewolf packs circle the shores and her mother's time runs out, the beast within grows restless. And someone is watching, waiting, sending messages that make her question everything she believes about monsters... and allies. Some monsters are born. Others are made. Olena is about to discover which one she truly is. Welcome to Grimhaven, where duty bleeds, love burns, and destiny has teeth. Perfect for readers who loved the enemies-to-lovers tension of The Cruel Prince and the forbidden romance and ancient magic of From Blood and Ash.