在城市角落，低价租房藏着意想不到的奇遇。深渊异形

　　A young couple, the Robinson's, rent a beautiful new flat for about the half the going rate of the same flats in the building. Poirot is puzzled by this, when he hears that many others had tried to rent the flat and were turned down. Poirot believes there is something unique about the Robinson's, and that whatever it is that makes them different, that difference is somehow rela... (展开全部)