On the first day when Qinghan became a maid in the palace, she met someone with a high fever and was waiting to die. Without medicine, she used cold water and spirits to physically cool down; without a knife, she used burned needles and thread to suture the wound. She is a modern surgeon who traveled to the era of Dayao. She saved a dying guard with one hand and also calmed down the epidemic in the palace. But she didn't know that Prince Jing Xiao Yu, who was coughing up blood all day long and seemed to be weak, had been hiding for ten years. In the court hall, the three princes covered the sky with one hand, and the Liu family watched eagerly. And he pretended to be ill, dormant, and forbearing, just waiting for a chance to break the situation. Until she showed up. He tested her origins, and she responded with her medical skills; he tested her loyalty, and she gave him acupuncture late at night to save his life. Don't you be afraid of me? The prince is a patient and I am a doctor. What should I be afraid of? Someone poisoned her medicine. He kept his cool and used his plan to uproot the Liu family's secret stake overnight. The prince was framed for rebellion. She found a flaw in the ink of a secret letter and helped him turn the tables. The court was shocked. He defended her against plotters and plotters, and she healed his old ailments and heartache. When the plague was rampant, she was at the forefront; when blood rained on the battlefield, she broke into the dead city carrying a medicine box on her back. He said to her: "I don't need this world. But I will protect you." She said: "Then you should live well and watch the world be peaceful with me." From the woodshed to the court, from dormancy to the sword, he spent ten years of forbearance to set up a trap, but because of her, he finally lost his last son. And with a pair of medical hands, she not only saved his life, but also warmed his heart that had been hidden for ten years. On the day he retired after his success, he took her to hide in the south of the Yangtze River. She said: "I just want to live an ordinary life with you." He said: "Okay, I will depend on you for the rest of my life."