Malmö, Sweden during the Second World War. Stig is a 15 year old pupil on the verge of adulthood. Viola is 37 years old and his teacher. He is attracted by her beauty and maturity. She is drawn to him by his youth and innocence, a god-sent relief from her drunk and miserable husband. They start a passionate and forbidden relationship - but it has consequences they never could have expected. 《教室别恋》史迪的性启蒙课：谁的湿地我的家。原罪。借酒精和性爱去完成的青春成人仪式。吾爱真理，但吾更爱吾师。门后。教室别恋——All things fair (Z)。很完整的成长曲。。禁忌的情欲、错误的关系。男人的进化论。年轻的诱惑。 37岁的女教师维奥娜（马莉卡•劳伦丝 Marika Lagercrantz 饰）美艳动人，当丝袜推销员的丈夫却整天出差，就算回到家也只是听音乐、喝闷酒，让她心里非常寂寞难耐。班上15岁的青春少年史迪（约翰•威德伯格 Johan Widerberg 饰）懵懂无知，有着青春期特有的冲动。师生间两眼对视的瞬间，自然而然产生了相互依赖的畸形恋情。 当他们完全沉醉在肉欲之欢里时，史迪对同龄的女生已经毫不感兴趣，拒绝了同班同学的暗恋。维奥娜的丈夫其实早已知道了妻子秘密，但他并没有揭穿妻子的秘密，而是继续饮酒、听音乐。此情此景，让史迪开始对自己的肉欲和这段畸形恋进行反思。
