电影《艳之夜》中，故事发生在遥远的伊豆大岛，主人公松生春二（阿部宽 饰）远离喧嚣的都市生活，与情人艳共同生活在这宁静的地方，仿佛是一对夫妇。然而，春二因为对美色的迷恋，经常四处留情，最终为病魔所击倒。临终之际，他心情复杂地照顾着这个左右了他一生的女人

在春二心中，他对艳的感情充满了疑惑，为了寻找答案，他踏上了一段寻访之旅。他先后拜访了艳的堂兄妻子环希（小泉今日子 饰）、上班族桥本凑（野波麻帆 饰）、中年寡妇桥川沙希子（风吹纯 饰）、以及在美容院工作的百百子（真木阳子 饰）。在这一段旅途中，春二接触到了她们的男友、丈夫、情人，以及与艳交错迷离的过往。

每一个人的回忆都是复杂而扑朔迷离的，春二在探访中逐渐理解了艳与这些男人之间错综复杂的情感纠葛。他们的回忆和过往令人难辨真伪，也让那些为情所困的男女陷入了迷惘之中。

In the movie "Night of Yan", the story takes place in the distant Izu Oshima Island. The protagonist Matsuo Haruji (played by Hiroshi Abe) is far away from the hustle and bustle of urban life, and lives with his lover Yan in this quiet place, as if they are a couple. However, because of his obsession with beauty, Chun Er often shows mercy everywhere, and is finally knocked down by the illness. When he was dying, he took care of this woman who had controlled his life with complicated emotions

In Chun Er's heart, he was full of doubts about Yan's feelings, and in order to find the answer, he embarked on a journey of searching. He successively visited Yan's cousin wife Huanxi (Kyoko Koizumi), office worker Minato Hashimoto (Maho Noami), middle-aged widow Shakiko Hashikawa (Jun Fuki), and Bai Baizi (Yoko Maki) who worked in a beauty salon. During this journey, Chun Er came into contact with their boyfriends, husbands, lovers, and the blurred past with Yan.

Everyone's memories are complicated and confusing. During the visit, Chun Er gradually understood the intricate emotional entanglements between Yan and these men. Their memories and past make it difficult to tell the truth from the fake, and also make those men and women who are trapped in love fall into confusion.