Sierra Martinez was found guilty for twenty-three different counts of arson in her hometown of Mijas, Spain. The day of the first outbreak she was send back on the first flight for Mijas where she would be put to death by lethal injection. During the flight the pilot would succumb to an infected wound he had received, and the plane would begin its crash course into Nyheim. The woman would be one of the only few survivors that would survive the trek to the nearest town. Sierra had been taken in by a small camp of survivors, both from the crash and native. She would become an essential member of the group as she uses her skills from her past life of crime. There would be no locked door that she wouldn't be able to get them inside, until one day, they opened the wrong one. A room of infected cleared out almost all of the survivors, Sierra having been the only one to survive. To this day she wanders, alone, to avoid getting close to any other survivor's she could possibly meet.