Jiang Zhaoxue, the legitimate daughter of the Jiang family, is forced to take her younger sister's place in an arranged marriage and marry into the notoriously dangerous Northern Jin Prince's Manor. There, she enters into a contract with Wuwang, a mysterious creditor trapped inside an ancient mirror. What begins as a marriage of convenience soon becomes something more. With her intelligence and resilience, Jiang Zhaoxue gradually establishes herself in the prince's manor. She befriends Liu Tao and others, while she and Xiao Chengyan, the Prince of Northern Jin who bears old injuries, support each other and gradually develop genuine feelings. Together, they unravel one conspiracy after another, confront schemes within the manor and threats from outside forces, uncover secrets of the past, and protect those dear to them. Breaking free from the unfair treatment of her own family, Jiang Zhaoxue stands her ground with dignity. She and Xiao Chengyan turn a marriage contract into a love freely chosen by both, setting out together toward a peaceful and bright future.