Modern young man Qin Mingfeng traveled through Zhenguan and rescued a princess who fell into the water, but he did not know that his wife was actually a golden branch of the Tang Dynasty. He relied on modern knowledge to collect grain, control floods, make soap, and open lottery tickets. He stabilized natural and man-made disasters with one hand and stirred up the chaos in the court with the other. Li Shimin paid a private visit incognito, and the more he read, the more surprised he became: How could I, a country son-in-law, predict the changes in the world and be able to humiliate the five surnames? When the identity was revealed, the whole court was shocked - it turned out that the most powerful prince-in-law was among the people!
