She and her brother went with a car six hours to a cementery in order to visit their dead father at their mother's request. There her brother was killed by a zombie in front of her eyes which left her traumatized.
The zombies also went after her. Because of that she fled to a house nearby in order to save her life. There she sees a dead human that had been half-devoured by the zombies and there she also meets Ben and the others who later fortify the place for theri own protection.
She was in a state of shock because of the events. Later her brother, who by then had also become a zombie, lured her to the other zombies. After that she was devoured by them offscreen.