Caught in a rainy night, Evelyn accidentally steps into the supernatural world and encounters Lucien, an enigmatic vampire. Three factions—witches, werewolves, and vampires—covertly coexist in the town of Ravenshade. The mysterious mark on Evelyn’s wrist marks her as a descendant of the long-extinct First Bloodline, making her the most sought-after target among all forces. She also faces the threat of awakening ancient entities and the menacing First Vampire King. Refusing to pledge allegiance to any faction, Evelyn ultimately rewrites the rules by turning herself into a seal, leaving an unresolved end to this bloodline conflict.