影片描写了中学生的学习和生活﹐美枝刚到一所女子学校寄读﹐就遭到以芊蒂为首的富家女生的戏弄﹐看到他们经常欺负同学﹐一次舞会中﹐遂与阿蕊等人连手对付并令她们丑态面出﹐学校举行竞技大赛﹐美技等人参加﹐却体育教师拒绝﹐此时刘老师毅然担任她们的体能训练老师。众人设圈套﹐令美枝误会离开男友﹐经过激烈的角逐﹐美枝夺得了第一名。

Maggi has transferred to a girls' boarding school in the new semester. No sooner than she has arrived, she has already had an enormous conflict with a group of girls called Purple Dolls. Among Maggi's teachers, Mr. Lau, a biology lecturer has accepted the challenge and started training the girls for the annual physical endurance competition. But when the roommates' spirit is escalating, Maggi is depressed by the destruction of her romance...