For Thalia, monster-hunting is just a job—a brutal but necessary way to protect innocents and keep food on the table. But when she unknowingly slays a demon, she draws the attention of an ancient evil that refuses to let her escape unpunished. Marked by dark forces and hunted by vengeful demons, Thalia and her warrior brother Roderick must survive an endless pursuit across a world where fate itself seems to turn against them. As their every step takes them closer to the abyss, Thalia must confront the truth: some enemies can’t be killed, and some marks can never be erased.