The legitimate eldest daughter of the century-old Xie family awakens to unexpectedly become the true eldest miss of the Nan family, who had been straying outside for twenty years. Facing biased parents, a green-tea fake younger sister, and a house full of snobs, she is neither humble nor pushy, using family rules as her blade and strategy wisdom as her shield, advancing step by step. A cup of ancestral tea subdues the old master, a single sentence dismisses a rude tutor, and a birthday banquet dazzles the high-society circle. When the feudal ancestor encounters modern inner-courtyard struggles, who is the real winner?