Lin Mo, the double director of the Department of Surgery and the Department of Infectious Diseases of a modern tertiary hospital, accidentally traveled through the reign of Renzong in the Northern Song Dynasty, and his soul transmigrated into a low-level medical worker in Chengtai Hospital who was marginalized and was about to be accused. Relying on a modern medical system that spans thousands of years, he uses surgery, sterile disinfection, epidemic prevention and control, pathological diagnosis and other dimension-reduction and strike-level medical skills. He started by treating the son of a courtier, and then slapped conservative imperial doctors, pedantic civil servants, and corrupt officials.