Xiao Yuheng, the Eighth Prince of the Daqian Dynasty, who held a large number of troops and had overwhelming power, was struck by a strange thunder during a palace coup. When he woke up, he found himself in an unheard of "modern" world. The towering iron towers, the fast-moving iron boxes, and the scantily clad men and women all impacted his cognition. His former royal power and wealth disappeared, and he became a "black householder" with no identity and penniless. Living in the home of a lively modern girl, the former prince was forced to embark on a ridiculous path to survive in the modern world. From learning to use the toilet to understanding banknotes, from selling letters on the street to using ancient political wisdom to stir up the modern shopping mall, while Xiao Yuheng was looking for a way home, he also accidentally uncovered a shocking secret that spanned thousands of years.