在这部游泳的女孩剧情/喜剧片中,姬文（伊希尔·勒·贝斯柯 Isild Le Besco 饰）和莉兹（Karen Alyx 饰）从小一起长大，是无话不谈的闺中密友，然而，姬文成长与海边小镇布列塔尼，而莉兹则生活在大都市巴黎，只有等到每年夏天，跟随父母去海边度假的莉兹才得以和姬文共度暑假，对于这珍贵的时光，两个女孩分外珍惜。
某日，莉兹的父亲不幸去世，无法排解心中的困惑和悲伤，莉兹独自前往布列塔尼寻找姬文。姬文的个性活泼又开朗，正直情窦初开的年龄的她对男孩充满了兴趣，懵懂的姬文并没有看透莉兹所遭遇的不测，而莉兹则对姬文的放荡和不理解深感失望，误会和隔阂渐渐地在两个女孩之间产生了。
Gwen is a teenager living in a small coastal town. Lise is her best friend, a city girl who comes every year with her family to spend the summer. This year things are different though; at first Lise might not come at all, and when she does it is obvious that Gwen grew up faster than she did.
