When the doomsday comes, Li Xiang is just an ordinary supermarket cashier. Fortunately, he activated an ambulance given by a mysterious system - a mobile field hospital, which has absolute defense and medical assistance capabilities. But this car is not the ark of the savior, but a moving cage and gambling game.
Every time he goes to a new place, Li Xiang has to make a choice: open the door, or not? Save that person, or stand by and do nothing? He has seen the despair of being bitten by zombies, and he has also seen the greed in the eyes of survivors. The system does not force him to become a saint, but only gives him the tools and problems to survive.
This is a story about ordinary people surviving in the cracks of doomsday. There is no heroic halo, only the trembling every time the door opens, and the long night after every closing. And the absolute defense circle of his old ambulance was only ten meters.
