杜威•费恩（Jack Black 杰克•布莱克 饰）是一名已过而立之年，却仍在为理想打拼的摇滚音乐人。他不屑于那种粗制滥造、充满向商业谄媚味道的虚伪乐曲，一心追逐真情实感的纯粹摇滚乐。为此，他和无数支乐队分道扬镳，至今事业无成，还面临被房东赶出去的窘境。 　　杜威的男房东兼老友内德•斯尼勃利（Mike White 麦克•怀特 饰）此前曾是狂热躁动的死亡摇滚乐手，如今摇身一变成为了居家好男人以及代课老师。杜威闲赋家中时，偶然接到一通来自某中学的招聘电话，对方邀请内德迅速来学校代课。穷极无聊兼为生计所迫的杜威偷梁换柱，以内德的身份进入这所校风极为严谨的名门中学教学。学生们的死气沉沉一度让他倍感无聊，某天，杜威无意中发现孩子们的音乐天赋。于是，他瞒天过海，带领这群只知道读书的孩子们进入一个全新且乐趣无穷的摇滚世界……Down and out rock star Dewey Finn gets fired from his band, and he faces a mountain of debts and depression. He takes a job as a 4th grade substitute teacher at an uptight private school where his attitude and hijinx have a powerful effect on his students. He also meets Zack, a 10-year-old guitar prodigy, who could help Dewey win a "battle of the bands" competition, which would solve his financial problems and put him back in the spotlight.