Su Ming, an ordinary young man, accidentally activates a dimensional visitor system, and Xu Miaoyun from the eighth year of the Hongwu era of the Ming dynasty suddenly travels to his home. Even more unbelievably, a celestial screen appears over the Ming dynasty, where Zhu Yuanzhang, Xu Da, and others watch everything unfold in real time! As the modern and ancient worlds collide, Su Ming's every word and action changes the course of history. With a seven-day countdown, Xu Miaoyun must return to the Ming dynasty. During this brief time, she witnesses the splendor of modern civilization and shows the Ming dynasty's ruler and ministers the possibilities of the future. Meanwhile, as Su Ming and Xu Miaoyun spend their days together, feelings blossom between them that transcend time and space.