作为家中最小的儿子，罗伦特（贝努阿·费雷 Benoît Ferreux 饰）理所应当的享受着更多的照顾和关怀。罗伦特的母亲克拉拉（蕾雅·马萨利 Lea Massari 饰）是一个思想和作风都颇为开放的意大利人，这给罗伦特的成长史打上了不可磨灭的印记。罗伦特就读于一所校风极其严谨的天主教学校，在压抑和束缚之中，十五岁的罗伦特开始对“性”产生了兴趣。 　　由于心脏发生了病变，罗伦特被克拉拉带到了一处温泉旅馆疗养，在那里，他认识了黛芬尼（Corinne Kersten 饰）和海伦（Jacqueline Chauvaud 饰），让罗伦特惊讶的是，他发现他的母亲竟然和与自己差不多大的男孩子调情。克拉拉被情人抛弃，伤心的她喝得酩酊大醉，在照顾醉酒的母亲的同时，罗伦特终于忍不住踏过了那条伦理道德的界线。This is a jolly coming-of-age story about a 14-year-old boy named Laurent Chevalier who is growing up in bourgeois surroundings in Dijon, France. This is France in the mid-1950s rather than America in the 1990s. Thus, Laurent is unharmed by events which would irreparably shatter the self-esteem of a modern American adolescent: he gets drunk, he smokes, he has sex, he is smothered by his mother, he is ignored by his father, a priest makes a pass at him, he gets rheumatoid fever, etc. There's enough scandalous behavior in this film to make 100 made-for-TV movies, and yet this is a very happy and oddly innocent tale.