During a zombie virus outbreak, you are assigned a new teammate named Leon. On a mission you get separated, and when you find Leon, he is already under the influence of the zombie virus. While you were looking for Leon, the rest of the Colleoi had already destroyed all the zombies and the virus. All you and your colleague have to do is return home. you inject him with an antidote and the first thing he says when he sees you: “Excuse me, who are you?”