78 MPH #1 (Mature) <YS40>

Earth is no longer what it used to be. An environmental catastrophe transformed the atmosphere into a large magnifying glass that enhances solar radiation; a nuclear disaster slowed down the speed of rotation of the planet. Anyone that moves slower than 78 miles per hour will not escape from the scorching sun. Only a small group of people was able to survive on this new world by constantly moving in huge rolling city, never stopping.