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.
故事发生在遥远的2020年，在与神秘生物“原生动物”的战争中，人类第一次体验到了彻底失败的滋味。土地被剥夺，权利被挤压，在残酷的独裁统治下，人类被迫过着压抑的生活，过着贫困的生活。然而，即便如此，强者仍然没有放弃反抗的机会。
上野紀香は結婚二年目の若妻である。夫・浩一の東京本社勤務がきまり、ようやく羽を伸ばし新婚生活を楽しめる筈だった。が、浩一は会社でのプレッシャーか家に帰っても直ぐに寝てしまう。
