Xu Mo, an architecture student, time-travels to Chang'an in the seventh year of Zhenguan, awakens the strongest supermarket system, and opens the Datang Supermarket in the East Market. On opening day, Li Erlang and Cheng Yaojin, traveling incognito, come by reputation and are brought to tears by spicy strips. Xu Mo displays his martial arts skills, easily knocking down the Jinwu guards, winning the admiration of the emperor. The shop sells novel and wonderful goods such as spicy strips, refined salt, facial masks, and bread, and later unlocks hot pot base, toothbrushes, and women's hygiene products. From the emperor and empress, a host of dukes, down to noble daughters, everyone is captivated by the novel goods. Xu Mo has no heart for officialdom and only wants to lie flat and enjoy life.