Time setting: 2024, a modern city, an era when smart homes are popular. The disaster broke out in the midsummer of July, and the apocalypse amidst the chirping of cicadas was even more absurd.
Location setting: The story takes place in Luzhou City, a southeastern coastal city. The Century Yunting Community where the protagonist lives is a smart community built with new environmentally friendly building materials and equipped with a face recognition system and a solar power supply system.
Basic background: An unknown virus spreads through cold chain transportation, and infected people will develop cognitive confusion and aggressive tendencies within 72 hours. The government initially adopted silent management, but after three weeks social order completely collapsed.