A sudden outbreak of a rabies-like virus turns a school classroom into the starting point of a catastrophe. After waking up, esports gamer An Beibei discovers that she has somehow entered a real-life apocalypse resembling an FPS zombie game. The virus spreads rapidly, and cities across the region begin falling one after another. Meanwhile, a scarred man wearing a scarf frantically tries to call her, Lin Jia returns from abroad, and A Jie flees with a suitcase. A mystery involving a mole inside the laboratory lurks beneath the surface. As the boundary between virtual and real worlds disappears, everyone becomes trapped in this countdown to disaster. Can they escape the mutated world alive?