It tells the love story of the smart and cheerful girl, Chen You You, who was forced to marry the unpredictable Lord QianSui, Bai Li.

Bai Li is the great eunuch who is highly relied upon by the city lord. The unpredictable Lord QianSui has a cold personality and became the first handsome man in Fuxian City. He hid his identity as a fake eunuch to find out the truth of the unjust case in the same year. Meanwhile, Chen You You is a smart and cheerful girl who really yearns for a happy and free life, but her family is very strict to her.

The peerless swordsmith, Meng Yezi, suffered the calamity of family extermination from the traitor Zhao Han served in the court for casting the famous Hanguang Sword. He desperately saved his son Meng Yang and left him the unforged Chengying Sword. Twenty years later, Meng Yang grew up and tried to avenge his father. At that time, Chengying Sword had not been cast yet to compete with Hanguang Sword. Then, the emperor was dying, and by chance, Meng Yang was assigned to escort the prince Gong Zidu back to the palace to succeed to the throne. Meng Yang accepted the task to investigate the truth about his family extermination for avenge. However, he met a fatal disaster on the way...