After downloading a steam workshop map on his computer, our protagonist finds out it's more then just a simple defuse map.

Set In a post-apocalyptic time. An infection has spread throughout the world, caused by the cordyceps fungi that gets inside humans bodies turning them into Zombies. Joel Miller is partnered up with a young girl named Ellie who is immune to the infection. A group called 'The Fireflies' claim that young Ellie could be a cure for the infection. Joel and Ellie go on adventures fighting all kinds of zombies, fighting to survive, gain trust, and witness the deaths of people they are close to. Will they ever meet up with the Fireflies? Or not?