A county magistrate's daughter loses everything but regains her life by masquerading as a minister's daughter, overcoming injustice with help from Duke Su Xiao Heng, rescuing her imprisoned father, and upholding justice.

Xue Fangfei, the daughter of a county magistrate who came from a wealthy family and lived a happy life, lost everything after encountering a major change. Entrusted by her savior, Jiang Li, the daughter of the Minister of the Central Secretariat, she returned to the capital as Jiang Li. With the help of Duke Su Xiao Heng and others, she overcame numerous difficulties, constantly fought against injustice, and finally rescued her father who was accidentally imprisoned. She also helped Xiao Heng uphold justice and protect the people, and finally regained a good life.