Su Chen, a debt-ridden small modern boss trapped in financial trouble, accidentally activates an ancient cloth bag that can connect parallel space-times. At the other end of the bag is Lin Nan, the female emperor of Great Xia who is in a difficult situation. With the help of the ancient bag, Su Chen sends modern supplies such as instant noodles and mineral water to ancient times, engaging in cross-space-time trade with the female emperor. Desperately needing supplies to get out of trouble, the female emperor takes out imperial treasures in exchange. People from two worlds communicate with each other relying on the ancient bag, and a wonderful cross-space-time transaction begins thus.