Lu Zhiwei, the daughter of a medical family, was wrongly married in her past life to Pei Xingzhou, the young master of the Pei family, and died a wrongful death while pregnant with a lost child. In a new life, she returns to the day the Pei family comes to propose marriage, refuses to marry her former husband, and instead asks to marry Pei Yanchuan, the master of the Pei family. Using her medical knowledge and extraordinary strategic mind, she enters the inner courtyard and steps into the business world, tearing down corrupt parasites, outsmarting arrogant step-sons, plotting step by step to avenge her past life's blood feud, and also protecting the four fetuses safe in her womb. From a boudoir woman manipulated by others to living as the matriarch of the Pei clan who manages the household, establishes a career, and stands on her own firm ground.