An ordinary noodle shop hidden in an old street conceals the secret of an ancient centuried bell. Whenever the ancient bell flickers with a faint light, the passage connecting different worlds opens up. The shop owner Xiao Ning receives visitors from different worlds, exchanging supplies to help visitors in desperate straits overcome difficulties. As exchanges between different worlds become increasingly frequent, the fragments of the ancient bell produce anomalies one after another, and the secret hidden for many years slowly emerges. In each encounter, Xiao Ning explores the truth behind the ancient bell.