Evelyn Lee from the 22nd century travels to the fictional Great Liang Dynasty as Karen Lee with the eldest prince. Originally, they're shunned due to obesity and die miserably. To change fate, she loses weight with her son, uses a time-space supermarket to foil Consort Yu's plots, saves the Grand Empress Dowager and emperor, and wins people's hearts. Rejecting the emperor, she leaves the palace. The emperor passes the throne to the eldest prince and pursues her.
