Lin Qingyue, director of a modern law firm, once traveled through time and became Pei Shen, the legitimate wife of the second wife of the Duke of the town. The nineteen-year-old body is trapped in a deep house, but inside is a thirty-three-year-old rational soul who understands people's hearts and is proficient in accounting. She has set three bottom lines in life: hold on to the dowry as a card to make money, do not offend others unless others offend her, regard marriage as a mutually beneficial partnership, and never be sentimental.
The situation in the mansion is complicated and complex: the mother-in-law is good at checks and balances, the eldest sister-in-law has hidden rifts, the two concubines have their own agendas, the husband Pei Jingxing is gentle and distant, and troubles in the court may also implicate the Hou Men at any time. Lin Qingyue put away her sharp edge, acting as a gentle and virtuous matron to the outside world, while secretly reviving her private property internally. She tracked down the dowry farms where the stewards were corrupt, improved agricultural products and won the hearts of the tenants; she opened an embroidery workshop, gathered women from the lower classes to form a secret intelligence network, and took advantage of the situation to expand the business of silk and southern goods, and step by step embarked on the road of maritime transportation and people's livelihood philanthropy.
Internal battles, business wars with colleagues, and frame-ups by political opponents followed one after another. People repeatedly dug into her strange origins. Lin Qingyue relied on legal thinking and business skills to resolve the crisis, and reached a tacit understanding of distinguishing public and private affairs with Pei Jingxing. The two became allies and worked together to overcome difficulties. She protects countless women who are in need, establishes a corner of women's cooperation, does not rely on her husband, does not rely on home struggle for favor, and maintains stability throughout her life with sobriety and self-restraint.
As time goes by, children and grandchildren grow up, and relatives and friends have their own destinations. Pei Jingxing passed away first, and Lin Qingyue lived to die at the age of seventy-three, leaving behind a book "Qingyue's Notes", which revealed the true meaning of half a life: gentleness is the choice of life, sobriety is the bottom line of one's life, and one can earn a satisfactory life in a high school without relying on love.