Emperor Zhao Zhen (Wang Kai) of the Northern Song Dynasty ruled the country fairly. decisively manage the conflict in the royal court By holding the principle of balance of power of all parties equally as a scale Even if the country is at peace But the internal affairs turned out to be unsatisfactory. When he learned that Tai Hao Liu'er He who raised him was not his biological mother. But it's Li Lanhui. Lady in the Tai Hao servant His Highness gave his daughter Hui Rou (Ren Min) to marry Li Wei. The Li family's descendants in return for the family's merits. But Princess Huirou had a heart for Wai Ji (Bian Cheng), who had served by the princess by her side since childhood. Therefore, she chose to contravene the royal traditions and rules to protect her love. The forbidden love that was born caused heavy criticism. The nobles were not pleased. When the love of the daughter and the principles of country governance contradict each other How will Emperor Zhao Zhen decide? And where will the princess' forbidden love end?