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Meteors fall from the sky, and gray fog engulfs the city. Those who survived were either transformed into shadows or awakened into alien beings. Chen Mo woke up in the blocked building. What he faced was not zombies or wild beasts. It's an incomprehensible rule-based killing hidden in the fog. Ability is the hope of survival, but it is also the poison that corrodes the soul. Break out of the dead building, walk through the foggy streets, and step into the underground lair. He finally reached the high wall, only to find-- The safe zone is the most terrifying prison.