Li Hansu was originally the chief physician of the Department of Infectious Diseases at a tertiary hospital, but he traveled through time and became a child of a lowly medical family during the Yongle period of the Great Zhou Dynasty. In this dynasty where doctors had a low status and plagues occurred frequently but no one took them seriously, he witnessed with his own eyes that quack doctors were in power, the powerful concealed the epidemic, and countless people who could have been treated were dragged to death. The corpses piled up in mass graves aroused his anger and conscience as a doctor.
From being rewarded for curing the feudal king's stubborn illness, to taking the first place in the medical examination and entering the Imperial Hospital; from proposing the isolation concept of "preventing epidemics like preventing enemies", to establishing free clinics among the people, training military doctors, and promoting disinfection and cowpox vaccination - Li Hansu single-handedly instigated the public health reform of the entire empire. However, every step he takes, he has to face the joint suppression of traditional doctors, witchcraft and powerful drug dealers.
When the enemy launched biological warfare with plague corpses, he quickly initiated an emergency quarantine to save the capital. The "Complete Book of Preparation for Emergency" written by him was promoted throughout the world, so that the population was prosperous and the supply of troops was sufficient. This is a legend of how one person, an anti-epidemic army, and an advanced idea used medical skills to save the country and prevent foreigners from coveting it again. Li Hansu proved that the battlefield of doctors is not only in the hospital, but also in the world.
