The Huang family in Qingyun Town, a water town in the south of the Yangtze River, is the richest in the area. In midsummer, the master Huang Tianming is about to celebrate his 60th birthday, and the eldest daughter who has been studying abroad for several years and Du Chunxiao, who is also studying with him, are about to return. The whole family is very busy. Master Huang is particularly concerned about Du Chunxiao, who is studying with him. He not only allows her to live permanently but also betroths her to his eldest son, which surprises the whole family. However, strange things have happened one after another since Du Chunxiao came to the Huang family. Curious, smart but simple Du Chunxiao is unconsciously wrapped in the secrets of the Huang family. Her unwillingness to give up makes her slowly discover the true face of Master Huang's sanctimonious appearance. Her persistent investigation has put herself in trouble many times. In the process, she slowly develops feelings for Huang Muyun, the second young master of the Huang family. Huang Muyun's chivalrous heart finally helps Du Chunxiao find out the mystery of her life experience and uncovers the crime committed by Master Huang 20 years ago. Du Chunxiao and Huang Muyun finally leave the sinful Huang family and look for a future that belongs to each other.