Eleanor, the daughter of an earl, was born into a prestigious aristocratic family but was treated coldly by her family. After her fiancé was stolen by her younger sister, she closed her heart. Then she met Duke Clive at a ball and he proposed a contract marriage. The relationship between the two, which was supposed to be based solely on mutual interest, eventually deepened, and Eleanor began to walk a new life. However, Clive had a secret that he could not reveal to anyone: he was a vampire.