The Shen family and the Gu family in Jiangnan have been friends for generations. Shen Henghua, the legitimate daughter of the Shen family, and Gu Changyan, the legitimate son of the Gu family, were born in the same year and month, and they were engaged since childhood. The two grew up together in a water town in the south of the Yangtze River. From ignorant children to young men and women who have just begun to fall in love, they have a deep relationship.