Horatio Leavenworth, an immensely wealthy bachelor, is a retired merchant who enjoys great social position and respect. His two orphan nieces, Mary and Eleanor live with him in a luxurious mansion in New York's upscale Fifth Avenue. One morning, he is found mysteriously dead in his study, shot neatly through the back of his head. His will, written some time earlier, is discovered, in which he has left his entire fortune to one of the nieces, while cutting out the other completely. The buildi ...