Lin Yue, a modern genius surgeon, is struck by lightning on her way home after completing a long, difficult operation. She unexpectedly transmigrates into Su Yao, the legitimate eldest daughter of the Duke of Zhenguo's household. Though the original owner is noble, beautiful, and talented, she lost her mother as a child and has endured constant torment from her stepmother.
As soon as Su Yao awakens, the emperor arranges her marriage to the mysterious and much-favored Prince Duan. Faced with this sudden turn of fate, Lin Yue knows she cannot disobey an imperial decree and has no choice but to accept. While dealing with her stepmother's false show of concern, she secretly makes plans, determined to use her modern medical knowledge to establish herself in the ancient world.
Hearing from the maids about Prince Duan's extraordinary nature, Lin Yue can't help feeling curious about the man she is about to marry. To adapt to life in ancient times, she studies historical texts day and night to learn about the dynasty, and keeps practicing horsemanship and archery to improve her abilities. As the wedding date approaches, she prepares for the ceremony while a bold idea quietly takes shape in her mind: to break the shackles that bind women in ancient times, build a harem in the inner courtyards and royal palace, and experience a different kind of life. Thus begins a legendary journey combining medicine, political intrigue, and romantic love.