Jiang Shuyao, a homestay owner in three million debt, accidentally binds with the Myriad Realms Trading System, and can obtain rewards simply by hosting guests from other worlds. Qin Emperor Ying Zheng, the assassin A Ke, Tang Taizong's young son Li Zhi, Sun Wukong, and others arrive one after another; after an alien attack, the homestay plunges into the Void Space. Jiang Shuyao and childhood friend Fu Jing shuttle through the Women's Country, Monster Cave, and Lion Camel Ridge, rescuing Tang San and joining forces to repel Futian Gui. After this, past emperors, heroes, and otherworldly guests jointly operate a food street, using cross-border orders to help defend Suiyang, opening up a new Myriad Realms business.