Lin Wanxing, 22 years old, is a senior student majoring in clinical medicine at a medical university. He specializes in emergency medicine. He has strong hands-on skills, an independent and tough personality, a bit of a venomous tongue but a soft heart. Before time travel, he fainted due to overwork in rescuing patients. In the seventeenth year of Kaiyuan of the Tang Dynasty, in Chang'an, the protagonist's soul traveled to the body of Liu Mingwei, the legitimate daughter of the Liu family in the south of the city who died young. The original body died due to mistreatment of cold, giving Lin Wanxing a new life. Xiao Che, 28 years old, is a fifth-rank judge in Jingzhao Prefecture who joins the army and is responsible for prison autopsy. He has a calm and taciturn personality and keen observation. Because he was assassinated during the investigation of the case in his early years, he developed a hidden disease in his right leg. He hates quack doctors. The collision between modern medical concepts and the ancient Chinese medicine system. While hiding his identity and using medical knowledge to survive, the protagonist has an intersection with Xiao Che due to a series of cases involving "abnormal death", from mutual suspicion to mutual trust and love.
