Fan Yuzhen, a social servant, was disguised as the daughter of a fifth-rank civil servant. To protect her family, she was forced to marry into the Duke's mansion to celebrate the coma of the prince's son. For three years, she and her mother-in-law, the eldest princess Li Wan, lived together and lived a prosperous and comfortable life. After the prince regained consciousness, Fan Yuzhen realized that he belonged to someone else and decided to make peace with her. Unexpectedly, her mother-in-law was willing to leave together. The two started a free life, during which they solved many past misunderstandings, gained sincere emotions, and finally ushered in a new chapter full of hope in Jiangnan.