The year is unknown; infected humans have been in control of sporadic parts of the free world all across; China, Russia, Japan, Eastern and Western Europe, and the USA. Most of the human population was infected by a virus, causing mutations of the body and mind. The non infected refer to them as Zombies! Non infected humans were forced to go into hiding to avoid having their brains eaten by zombies. Many of us are not surviving well, our food supply is deleted, the water is contaminated, and wild life is not safe to eat as they are not immune to the virus and have mutated as well.
You and your friends in hiding hear word of a group that is fighting back against the zombies. They call their group World at War and devote themselves to ending the Zombie Apocalypse.
Your choice is simple, stay in hiding and risk starving to death or being too weak to fight when you are eventually found by the zombies. Or make your way to the World at War headquarters and find your new salvation.