The three hospitable sisters in Dublin hold New year's banquets at home every year, and their relatives and friends take this opportunity to get together and talk freely. After the banquet, the heroine heard an old Irish love song sung by the tenor in the stairwell, recalling the same song her lover loved to sing when she was young. After returning to the hotel, he told the husband frankly that his lover died for her, and the husband was surprised to realize that he knew so little about his wife. And the human mind is so dark and profound!