Shen Zhiwei, a top modern medical student, unexpectedly dies and transmigrates to the fictional Great Yan dynasty. She becomes the legitimate eldest daughter of the Marquis of Zhenbei's household, where her stepmother mistreats her and she lies gravely ill. To save herself and escape her family's plan to use her as a pawn and marry her off in her place to the Seventh Prince, Xiao Jue, known as the “Living King of Hell,” she draws on her modern medical and pharmacological knowledge to nurse herself back to health and seize every chance to show what she can do. Using her medical skills to turn the tables, she moves from the inner household's infighting into the world of court politics. She treats rare illnesses, uncovers a spreading plague, and improves the army's wound medicine, gradually clearing her name and building her reputation and resources. As she and the Seventh Prince Xiao Jue, cold on the outside but warm within and burdened by a painful past, move from mutual suspicion to fighting side by side, she uncovers the secrets of her birth and the Marquis's household's schemes. Amid the treacherous political landscape and border crises, she uses a healer's compassion and extraordinary intelligence to steady the court and benefit the people, ultimately winning freedom, respect, and a love unlike any other.
