One cold winter evening, some sixteen-year girl was home alone and watching TV. Her parents had gone on holiday to friends. all day went thick snow, but she felt good and comfortable sitting on the couch in the living room, curled up in a warm blanket. By midnight, the parents have not yet returned, and she began to feel anxious. Call them she did not want to they do not think that it can not take care of herself. TV was in the corner next to a large window. She watched another movie, when suddenly the corner of my eye noticed how something moves in the window. In the darkness of the falling snow, it distinguished the figure of a man walking toward her. As he approached, she could see his face. It was covered with scars and his lips were stretched into a sinister smile. Frightened, she froze, not daring stirred. The man just stood there and stared at her through the glass. Then he suddenly put his hand in his coat pocket and pulled out something. It was a knife .