Fate played a huge joke on her - Ling Wei, a beautiful doctor in the 21st century, died suddenly on the operating table due to overwork. When she opened her eyes again, she turned into Lin Wei, a frightened peasant girl who had just drowned in a small village during the Yongle period of the Ming Dynasty. With a loving father and mother, and a protective brother, this family was poor but warm, allowing her to find a bond in another world. She originally wanted to live peacefully, but the doctor's kindness and modern medical knowledge engraved in her bones made it impossible for her to turn a blind eye to the pain in front of her. He tried his skills to save his niece for the first time, and "learned skills in a dream" to hide his edge; he anonymously offered suggestions to fight the plague, and salt and sugar water showed miraculous effects. Just when she thought she could quietly change her surroundings, a "prescription" with traces of modernity leaked out during the epidemic caught the attention of a noble man who was passing through this place, and also attracted the investigation of the government forces... The path of low-key medical practice was full of twists and turns, and what awaited her were unpredictable crises and unlimited opportunities. From rural villages to state capitals, from treating one person to benefiting the whole world, she combined modern medical wisdom with the essence of ancient medicine. In this ancient time and space, she wrote her own legendary medical classics, and eventually became the most dazzling medical lady in the Ming Dynasty.