富女阿丽亚娜Ariane（简 伯金饰）和两个男人布吕诺Bruno（里夏尔勒迪克饰）、帕特里斯Patrice（乔治 芒萨尔饰）同居，三人和平共处，生活、嬉戏两不误。暑期来临，他们合计去度假，目的地是随机的全法各地。可是，他们之间不寻常的关系多多少少会令人惊讶，而他们的生活并不总是无忧无虑，阿丽亚娜也厌倦了这种奇怪的三角恋爱关系，决定离开这两个爱她的男人...... 然而，十年后，他们俨然一家人，只是阿丽亚娜的生活有了变化她已为人之母。In Serieux Comme le Plaisir, two men and a woman live quite happily together in a romantic liaison. The woman is probably wealthy anyway, so the trio doesn't worry much about money. One day they decide to take a trip in their beat-up car, managing the whole affair in their own special, insouciant manner. They are followed by a suspicious policeman who thinks there's something fishy about this group. As part of their play they tie the girl up, apparently leaving her behind, but she adamantly refuses to be rescued and heaps abuse on anyone who tries, including the hapless policeman. At some point she goes off with an Eastern monarch, leaving her lovers behind. She returns, and soon the trio is once again sniping at puzzled interlopers, playfully going about their business of confusing everyone. Later on in the film they are seen depositing their son at school where he is awaited by two young girls.
