title Princess of Darkness, beloved by the magical beasts, become my wife." In the midst of war, Setsurin (Xue Ling) is proposed to by Reiken (Ling Xian), the young emperor of Seikoku (Xing Guo). It was an offer of peace through marriage.

Setsurin was to live in the imperial harem as the "Dark Empress" by contract, but she was shunned by the people as an evil empress raised by the magical beasts. In order to protect her beloved magical beasts even if it meant that she was to don the mask of an evil empress, Setsurin intended to act according as one of the four consorts of the emperor, but she had a secret that she could not tell anyone... And Reiken, the Emperor of the Seikoku, who was considered by the magical beasts to be their long time enemy, also had a secret that he did not want others to know.