Su Ran, a graduate student in the history department, traveled through time and became the Hunjun of Chu. At that time, the prime minister had exclusive power in Dachu, and the Northern Yan was suppressing the territory outside. Su Ran changed his attitude and outsmarted the prime minister. He refused to cede territory and seek peace, and actively prepared for war. However, the struggle in the court continued, and the prime minister tripped and suspected of collaborating with the enemy, causing Northern Yan to attack. Thanks to the help of loyal ministers, the situation on the front line was reversed. However, Da Chu's internal and external troubles have not been eliminated, and Su Ran will continue to write a legend and try to turn the tide.