Under the prosperity of Bianjing in the Northern Song Dynasty, there is an alien defense device hidden. The device can resist interstellar invasion, but it needs to be driven by the luck of the Song Dynasty. The Liao and Jin invaded south, not only for the territory, but also to destroy the star defense device. Bao Zheng teamed up with the generals of the Yang family to solve the conspiracy of the court while strengthening the star defense, using the national power and loyalty of the Song Dynasty to protect the territory of China.
