One year after the "Scarlet Wave" virus broke out, the world became a wasteland. Former courier Chen Feng, relying on his familiarity with the urban terrain and a little bit of luck, struggled to survive in the apartment building where he lived. When the last can was opened, he had to step into a dangerous city occupied by mutated plants and "speeders", and go to a legendary refuge called "Rampoon Seven". This is a journey of a narrow escape. He will meet all kinds of survivors and will gradually uncover the shocking truth about the coming doomsday.