When you come home from working overtime late at night, you find that the familiar city has become unfamiliar. The owner of the convenience store on the street has become an unspeakable "thing", and a text message on your mobile phone reminds you: [Welcome to the strange story about rules, please abide by the "three no-nos" rule in this area, otherwise, you will be in danger. An ordinary person, after being involved in this thrilling puzzle game with life as a bargaining chip, had to quickly adapt to this crazy set of survival rules. Faced with twisted rules and encroaching strangeness, how will you use your wisdom to solve seemingly unsolvable mysteries? What you understand as daily life is just a carefully maintained illusion. Every choice may become a fatal foreshadowing. This city is far more dangerous and more... Tempting than you think. This is an extreme challenge about survival, intelligence and uncovering the truth!