Yun Chuxue's convenience store is on the verge of closing down, until she confirms that the person standing outside really is from a world of martial arts. She immediately calls her older brother back from his job away from home. Together, the siblings take charge of the old, twenty-square-meter shop in Locust Tree Alley, with each of them representing a different otherworld: one a martial arts world, the other a world of immortal cultivation. They cannot set foot in either alternate world and can only rely on customers recounting what happened during their next visit. With bargain-priced supplies and a ledger, they help refugees establish a dynasty and turn a useless nobody into a grandmaster. Meanwhile, on their side of reality, demolition plans, chain-store expansion, and schemes are steadily closing in on their doorstep.