Zhao Sheng, a young man from the 21st century, accidentally transmigrates to the Southern Song dynasty during the reign of Emperor Duzong, Zhao Qi. His soul takes over the body of the nine-year-old Crown Prince Zhao Xian. Less than ten years remain before the fall of the Southern Song. The court is controlled by the powerful minister Jia Sidao, while Mongol cavalry threatens the realm from beyond its borders. As a transmigrator, Zhao Sheng has modern historical knowledge and a modern way of thinking, but he faces a Southern Song empire mired in decay and a catastrophic crisis of national extinction rarely seen in history.
