As a concubine-born daughter, Wen Zhu took her legitimate elder sister's place to marry as a proxy for five years, dedicating everything to managing the household and raising the children. Yet her elder sister, Wen Shu, returned carrying a "first love" filter, teaming up with both her husband's family and her maiden family to force Wen Zhu to step aside and seize her daughter. Seeing through the hypocrisy and cowardice of her husband, Lu Qingyan, Wen Zhu stopped enduring and revealed her trump card as the big boss of Ziyun Pavilion. Aided secretly by Grand Chancellor Pei Xingzhi, she fought back step by step, exposing the truth of Wen Shu running away to be a concubine, shattering the conspiracy of a fake pregnancy to seize a title, and overturning the Lu family's foundation by utilizing the canal transport case. In the end, she obtained an imperial decree for a divorce, became independent with her daughter to build her career, transformed from a proxy marriage pawn manipulated by others into a business heroine, and also reaped a deep, affectionate protection spanning many years.