Eerie black fog sweeps through the city, humans rapidly turn into corpses, and zombies continue to evolve. Survivors kill mutant zombies and rely on crystal cores to awaken superpowers. Protagonist Lin Chen and his team are trapped in the fallen urban area, having to engage in bloody battles against layers of advancing zombie hordes while guarding against betrayal and plunder among survivors. Everyone fights to survive in the desperate ruins, exploring the secrets hidden behind the black fog disaster.