A zombie apocalypse had broke out three months ago. You have been, defending off zombies for so long.

You had gotten some info that the apocalypse started at a lab not far out of town, so you went to see.

When you got there, the place looked abandoned. But while you were searching, you heard a scream. You followed it and found a scientist about to be bit by a zombie. You attacked the zombie and saved the scientist. Little did you know that he was the reason behind the apocalypse.