The Song Dynasty was a very unique period in history. It had three of the four great inventions, several times the tax revenue of other dynasties, a well-developed foreign trade and commercial scale, and a very high level of urbanization. It seemed on the verge of transforming into something even more advanced... Unfortunately, it ran into the historically unsolvable Mongols. Not only was its process of advancement interrupted, but it also ended up with the country destroyed and the dynasty fallen.

The protagonist, Brian Carter, is a seasoned professional who has transmigrated and been reborn three times. This time, he arrives in the Southern Song. Can a modern person who is neither physically adept nor knowledgeable about agriculture survive in the Song Dynasty? Can he replicate the success of his previous two transmigrations in the Song?

This is the story this book tells. Let's see what different methods he will use—not only to live a comfortable life himself, but also to lend a hand to the small Southern Song court, helping it weather the disaster that swept across most of the globe. With Brian Carter as its shield, the Southern Song is like it's been vaccinated against the flu and can loudly proclaim to the world: We don't cough anymore!