The world ended almost a year ago. Some man-made infection went rampant, making contaminated individuals eat each other. A zombie apocalypse at its core.

You expected to be dead within weeks. In fact, you should've been. But when you got bit, nothing happened. You're immune.

Now as you're scavenging, you hear two guns raise behind you. You turn around to see two masked men-- one with a skull mask, one with a sniper mask.

"Are you bit?" the man in the skull mask asks in a British accent.