The winter of the third year of Kaixi (1207) was the darkest moment after the failure of the Kaixi Northern Expedition. The protagonist (a modern history enthusiast, 35 years old, master's degree in history, with five years of experience as a grassroots civil servant) accidentally traveled through time and became the second son of Song Guangzong, Zhao Kuo, the Song Ningzong who was supported by ministers but was controlled by powerful ministers for a long time. At this time, the Northern Expedition suffered a disastrous defeat, Jin troops were pressing down on the border, Han Yuzhou had just been executed, his head was about to be sent to the Kingdom of Jin, Shi Miyuan began to take power, and the ruling and opposition parties were in panic.