It had been a typical New Year's Eve party, but as midnight approaches, Mr. Satterthwaite -- a keen observer of human nature -- senses that the real drama of the evening is about to unfold. He's proved right when a mysterious stranger knocks at the door. Who is this Mr. Quin? He seems to appear and disappear almost like a trick of light. In fact, the only consistent thing about him is that his presence is always an omen -- sometimes for good, but...