Twenty years after being banished from Ireland and given up for adoption, MacKayla Lane's world shatters when her sister Alina is brutally murdered. Determined to seek justice, Mac returns to the land she barely remembers, only to uncover a reality she never knew existed.

Thrust into an ancient conflict between humans and immortals hidden among us for centuries, Mac discovers she comes from a lineage both blessed and cursed. Entrusted with the Sinsar Dubh—a dark magic book with the power to create and destroy worlds—she must navigate a treacherous path where allies and enemies blur.

As devastating events unfold and she shifts from the hunter to the hunted, Mac confronts the haunting truth of her origins. Faced with a life-altering choice that could save the world or doom it to destruction, will she embrace her destiny or let darkness prevail?