The story revolves around the emotional entanglements of Song Yunxi, Xiao Yanchen and Gu Tingyan. Song Yunxi lived in the Hou Mansion due to the decline of his family, and had a secret love affair with his eldest son Gu Tingyan, but due to the disparity in status and the situation in the court, they fell in love but couldn't. The regent Xiao Yanchen, who has been paying attention to her silently, has a deep love for her since they met in the temple many years ago, and intervenes in her life in a strong and gentle manner. A piece of paper conferring marriage tightly bound the fates of Song Yunxi and Xiao Yanchen. In the day-to-day relationship after marriage, Xiao Yanchen's extreme preference and protection gradually melted the ice in Song Yunxi's heart. From the initial alienation and struggle, she finally saw her own heart clearly, truly fell in love with the male protagonist, and stayed together for a lifetime. And Gu Tingyan became the most beautiful regret in those youthful years.
