After playing for quite a while, you decided to take a little nap. All of a sudden you got woken up by several gunshots that you could hear near you. The truck you were in was being chased by zombies as the people that surround you shoots them. After a while, the chase ended.

"Are you alright? Here, have some tools that you might need for later."

A stranger approached you and gave you armor, some food, and a rifle, which seems like the starter kit for the game.