Su Yao, a history graduate student in the 21st century, accidentally transmigrates into Lin Wanqing, the legitimate daughter of the Duke of Zhengyuan's household, while studying ancient texts. Her birth mother died young, and although her stepmother, Madam Li, seems kind on the surface, she secretly joins forces with the servants to bully and ostracize her, even plotting to make her fall into the water.
Having transmigrated into this world, Su Yao is determined to change her fate with her modern knowledge and sharp mind. She cleverly uses skincare products in the household, earning the servants' respect and securing her position. She also succeeds in making her stepmother and her allies wary of her, and the battle for power within the household begins.
