On the day of the graduation ceremony, the world changed. The originally familiar campus turned into the first survival copy after the bell rang. Rules came down, exits were blocked, and everyone was forced to be involved in a cruel screening game. Gu Chen accidentally discovered during his escape that he always seemed to be able to detect wrong endings one step ahead; while Lin Yu, who was calm and rational, quickly realized that there were greater rules hidden behind this disaster. As dungeons open one after another, schools, cities, hospitals, and ruins are transformed one after another. They must crack the rules, awaken their abilities, and find a chance to survive in a desperate situation. And Gu Chen gradually discovered that this sudden change sweeping the world was never an accident.
