Xie Sangning was originally the legitimate eldest daughter born into a prestigious family, groomed from a young age to be the lady of the house. However, she suddenly finds herself in a strange new era, becoming the real heiress of the wealthy Nan family who had lost her in the countryside. Although she is still the legitimate eldest daughter, her family members, while verbally expressing guilt, actually favor the fake heiress, her younger sister Nan Siya. But Xie Sangning is no stranger to the intrigues and struggles within a family mansion. Having been reborn in the modern world, Sangning now wears her ambition on her face. She is determined not only to secure her position in the Nan family but also to fight for higher status and greater power!