An affluent medical professor, Komiya, and his bossy wife, Tokio, are to look after Setsuko, their high-spirited niece from Osaka. Setsuko is a liberated woman who does what she wants, including smoking, even though she is a minor. On Saturday, the professor does not feel like going to his weekend golf game, but his wife packs him off anyway. So he leaves his bag at the apartment of his student Okada, and goes to a bar with a friend. Setsuko traces him there, and insists that he take her to a geisha house. When she gets rather tipsy, the professor calls Okada to take her home, while he sleeps at Okada's. The wife becomes suspicious of Setsuko when she sees Okada bringing her home, and also of her husband when she discovers that he did not go golfing.
秀一发现，母亲似乎有某种隐忧而不愿将曾根赶 出家门，另一方面，曾根好像又对遥香心怀不轨。对继父心存愤恨的秀一无计可施，于是通过网络购买碳酸钾，决定将曾根杀于无形。他的计划顺利实施，但他本人也越陷越深…… 本片根据貴志祐介同名小说改编。
华想收留这个孩子，给他取个名字叫青子。但另外两人表示反对。于是，他们三人踏上了寻找青子父母的旅程。平安夜的欢乐气氛伴随着怀里清子的哭泣。三个无家可归的人开始为同样无家可归的清子寻找自己的家。这群流浪者一夜之间经历了许多精彩的事件。他们能找到清子的父母吗？
