A modern medical doctor transmigrates into a book as a short-lived cannon-fodder character. From the start, she saves herself from the brink of death and immediately diagnoses the Prince Regent's long-hidden cold poison and old injuries. Her medical skills are extraordinary and her movements swift, allowing her to establish herself through her expertise. The chaste Prince Regent, who has never been with anyone, is gradually healed by her. He goes from using her to falling for her, then cherishes her alone for the rest of his life, changing her cannon-fodder fate.