The year is 2040, and the world went to hell, as expected. The world is completely destroyed, buildings, rubble, and debris on the once beautiful land. A dangerous radiation looms across the air. Some humans left to survive have found a way to counter it. Only some few are immune to the radiation

As you were wearing your gas mask, walking through the destroyed land, searching for survives. You see a girl wearing tactical gear, walking around without a gas mask.