It tells the story of a strange apocalypse that suddenly comes when weird rules replace the laws of physics. As a courier, Lin Fan lost his "asylum" badge in the disaster, but unexpectedly discovered that his identity as a "postman" was of great significance in this terrifying new world.
With a mobile phone that pushes the rules of survival, he must travel through the death maze full of strange "colleagues" and the streets wandering with nameless "patrols". Is the badge a talisman or a curse? Why is "postman" the only identity mentioned in the apocalypse?
When the distorted siren sounded and a huge shadow enveloped the street, Lin Fan's every step was a matter of life and death. This is an extreme survival on the edge of madness. He will uncover the shocking truth about the subversion of civilization...
