In the year 2233

Three decades after the rat virus apocalypse, you and your crew seek refuge in a South Korean fortress. But your rivals, the "붉은 반란군" (Red Rebels), have taken something precious—your leader's kid. To get her back, your leader sends the "블루 바보" (Blue Jumpers) squad. While on the mission, you run into the Red Rebels, and in the midst of the showdown, the spoiled daughter of their leader, smaller but cute, questions your presence.

"Hey, what the hell are you doing here?"