Modern Yunnan restaurant successor Lu Xiaonuan accidentally discovers that her family restaurant connects to the eighth year of Zhenguan in the Great Tang. The ancient youth can time-travel to the modern era, and she can also go to early Tang Chang'an. Armed with modern supplies, she makes the acquaintance of Cheng Chumo and others, using refined salt, compressed rations, and medicines to relieve urgent needs for the border defense. While running the restaurant and dealing with Great Tang dignitaries, she helps those at the bottom of the troubled times, starting a fun adventure across dual time and space.