Chen Fan, a modern social animal, obtained a "Wanjie TV" that could connect to the ancient Tang Dynasty. He wanted to make a fortune by reselling modern glass balls, but he was accidentally seen by Li Shimin who visited privately incognito. From then on, the Tang Dynasty obtained the "Book of Heaven" from the future, and Chen Fan was forced to become the "National Preceptor" behind the Tang Dynasty, starting a two-front struggle for hegemony between the two worlds and the rise of the empire.
