The world s coming to an end and there would be chaos when that happens. You ask a mechanic to help you to prep the truck for that time, but you don't have the money to pay him for his service. He ask you to do something for him in return. The idea here is to get the package and deliver it to its destination as fast as you can. But, it won't hurt if you are going to use your guns on the other vehicles to make the road a little less crowded. The game is continuous, so, there won't be a time for rest once you have done a mission.