You were one of the few survivors of a nuclear virus that has been set, and caused an endless winter called the Nuclear Winter. You have been roaming around as you've came across an abandoned house. So you said to yourself "Why not and explore it?" So you explored it.. and while exploring the house and it was after you killed some infected people with the nuclear virus.. you felt a hand behind you that held you be your neck. And a sharp knife held by your throat. They said.. "Who are you."