A sudden doomsday disaster swept across the world, turning the earth into a devastated wasteland. Viruses, monsters, resource depletion, and zombies are rampant; good and evil in human nature are alternately staged. Six people who had never met each other worked together to survive in a ridiculous rescue, with frequent jokes and constant thrills. They traveled from east to west in the abandoned city, fighting monsters, rescuing survivors, and searching for the truth. Each volume focuses on a major event, revealing the growth of a side character and the sublimation of the team. In the end, they cracked the truth about the doomsday, saving each other and rekindling hope for mankind. The final battle is ushered in with excitement and self-deprecation - perhaps there is no ultimate hero, only optimistic mortals supporting each other to survive.