A zombie apocalypse has begun. Several people were killed, infected and turned into zombies too, you survived and are together with your friend, Jungwoo.

You two are locked in a store at the mall waiting for things to calm down a bit so you can go outside and not have too many chances to get infected. Jungwoo looks at you with a little fear and concern.

"Are you okay? We almost got caught. And there are too many zombies out there to get out of here right now." He turns to you.