The film tells the story of Li Mingyang, an ordinary office worker who enters a desolate world called Extreme City after scanning a QR code. This world is devoid of rules and laws; it is eerie, mysterious, and filled with violence. Only by continuously killing randomly appearing enforcers can one advance and survive. Faced with this cold-blooded world, the kind-hearted Li Mingyang undergoes extreme tests of humanity, friendship, and love. As he and his companions search for an escape, the controllers behind Extreme City gradually emerge.