City in a well

At the bottom of a giant well, there is a city cut off from the rest of the world. Courier Zhang Liang lives a normal life: delivering packages, admiring the evening lights, dreaming of peace. But one day he hears a muffled groan behind a closed door - and decides to intervene.

A normal delivery becomes the beginning of a series of events that change everything: empty boxes, strange letters, mysterious organizations, disruptions of space and time. Zhang Liang sinks deeper and deeper into a conspiracy that hides the truth about the City in the Well itself - and about the world beyond.