Ordinary female college student Yun Zhizhi runs a small supermarket. Because her stepfather owes huge gambling debts, she is cornered and besieged by debt-collecting thugs. At this critical moment, she accidentally discovers that her supermarket can connect to other realms. From then on, cultivation youth Su Yanche, alchemy genius Yu Shian, primitive tribal maiden, and other powerhouses from other worlds arrive one after another through time and space. Relying on supermarket supplies, Yun Zhizhi trades snacks, grain, oil, and everyday items for spirit stones, magical artifacts, and heavenly treasures, mastering three-realm trading. While dealing with current debt-collecting forces and wealthy family entanglements, she shuttles between other realms to build trading ties, kicking off a fantastical and thrilling journey of the supermarket owner crossing realms to get super rich and make a counter-attack for self-preservation.