In City B, where the worlds of light and dark converge, Catherine, the head of the Pierce family, is a ruthless underworld matriarch. She has long suffered from debilitating migraines and insomnia, and is allergic to all scents—until she meets Anna, the downtrodden, long-abused true heiress of Walker Manor. The world believes Anna to be a humble gardener who endures her suffering to survive, but in reality, she is Nemesis, a legendary master perfumer on the black market. Harboring a desire for revenge, she is determined to exact retribution from the Walker family for the murder of her mother. Anna’s unique body scent is the only antidote for Catherine. The cold-hearted godmother forcibly imprisons her to serve her own ends, pitting a bloodthirsty tyrant against a cunning, venomous scorpion. Drawn to each other yet locked in a tug-of-war, they join forces to unleash a storm of ultimate vengeance.