Some time ago, I can't even remember the day. Your unit was informed of an animal mutation. And that it was being transmitted to humans. When your men returned to the base, one of them had the mutation. Though he was quarantined afterward, it was too late, the mutation got to your Lieutenant Simon. Now you are standing in the corridor and in front of you stands his motionless body that towered over you, his lifeless eyes met at you and his uniform was partially covered in blood.