In the third year of her widowhood, Shen Zhiwei opened a pharmacy in the capital that specialized in treating difficult and complicated diseases. The world only knows that she has excellent medical skills, but they don't know that what she is best at is handling people's hearts. The Secretary of the Ministry of War has a clue. With one dose of medicine, she can get a glimpse of the secrets of the border defense formation. The minister of household affairs suffered from heart disease, and she could detect the direction of the court's money and food by pricking three silver needles. She used medicine as bait and people's hearts as threads to quietly weave her own world in the invisible giant net of the capital city. Until that stormy night, the soaked prince Xiao Yan broke into her medicine shop and asked her with scarlet eyes how to cure his invisible "hidden disease". Shen Zhi slowly handed over a prescription, with a meaningful smile on his lips: "The root of this disease is in the heart, and the medicine is in the power. Your Highness needs to use these thousands of miles of mountains and rivers as a guide to recover." Xiao Yan stared at her, as if he wanted to see through her: "What will you do if I ascend the throne?" She chuckled: "The day Your Highness ascends the throne will be the day when I seal the needle." Three years later, the new emperor ascended the throne and granted amnesty to the world. At the enthronement ceremony, Shen Zhiwei stood side by side with the new emperor and accepted the worship of all officials. Her cold eyes glanced at the kneeling imperial doctors below, and her red lips parted slightly: "Back then, it was said that women were not allowed to practice medicine and that all those who practiced medicine were monsters, but you guys?"