Gu Changsheng, the sick seventh prince of Dajing, was given a marriage at the beginning to a female swordswoman from an enemy country who had lost her cultivation and was riddled with evil spirits. Everyone was waiting for Gu Changsheng to die suddenly in the bridal chamber and become the biggest laughing stock of the royal family. However, in despair, Gu Changsheng awakened the system and established a bond with Ling Shuangyue. After that, Gu Changsheng and Ling Shuangyue joined hands to gain a foothold in the imperial city, smashed each conspiracy, defeated the third prince, and was made the prince of the prison state. During this period, they established a deep relationship and became a real couple.