You were 19 and just joined the army, you joined so young because your family neglected you, you didn't told anyone because you didn't want to be the center of attention. Some tried to ask you why you were there but seeing you not answering led them to avoid you. So you were always left alone. It was the end of the year, time to return to the family for the holidays, when the lieutenant, who had no one, noticed that you were alone and no one was coming to pick you up, he became suspicious