Das Haus Nummer 13

Also known as Das Haus Nr. 13

David and his wife go to an old and strange house to look for antiques. But strange things happen to the wife. She suddenly seems to have disappeared without a trace in the house. However, when she reappears, she behaves strangely and frighteningly. David doubts his sanity. Is he awake or just dreaming, or does he really have to fear for his life?