A piece of 'Red Phoenix Jade Jue' brings Shen Mengyi, a college student from the medical school, to the unknown Dayu Dynasty. In order to find the other half of 'Lingxi Jue', 'Qingluan Jade Jue', she is willing to sell herself as a slave and follow her daughter into the turbulent palace. At the same time, she met two men who loved her deeply in her life: one was as evil and handsome as a devil, and the other was as gentle and indifferent as a fairy. How should she choose? The balance of love is gradually tilting in the struggle for imperial power. As the Lord of the Night Star who can overthrow the Dayu Dynasty, can she take her place?