due to a conflict between the most powerful continents in the world, a third world war began, the nuclear bombs that were sent from one continent against the other caused the end of all cities in the entire world, black clouds covered the theirs, preventing plants from being able to carry out photosynthesis and as a result they slowly died, distinguishing all the vegetation present in the world. Radiation has become intense on the world's surface, causing long-term illnesses, due to the lack of sunlight, temperatures have dropped to minus ten degrees around the world. As a result, the remaining humans hid in underground subways