加藤是一个电视制片人。他有一个妻子雅子和一个年幼的儿子太郎。加藤还有一个大学时期就认识的朋友山崎本明。山崎的女朋友理子是一个演员。山崎是一首散文作家也是个好色之徒，他开始与雅子有染，但他还是和理子住在一起。理子倒是不太关心山崎的作风。她对男人都是不信任的。有一天，加藤回家撞见了雅子和山崎的外遇。雅子只穿着睡衣，她说山崎“醉酒了正好顺道住下了”。加藤假装相信这个故事，但他知道真相。雅子认为她和加藤的婚姻已经完了，但加藤无意要离婚。雅子开始和山崎住在一起，加藤则搬到了雅子那里……

Kato is a small time TV producer. He has a wife Masako, and a young son Taro. Kato also has a friend Yamazaki who he knew since college. Yamazaki has a girl friend Riko who lives with her younger sister Yuko who's an actress. Yamazaki is a lyric writer/womanizer and he starts to have an affair with Masako, but he's still going out with Riko.

나카야마 치나츠(中山千夏)의 동명의 소설을 원작으로 하고 있는 영화. 중년을 맞는 부부와, 남편의 친구와 그의 젊은 정부(情婦)들의 성(性)적인 나날을 그리고 있다.