A struggling musician, desperate for a job, scams a job as a substitute teacher in a private school. Clueless as to how to teach the kids, he slacks it for a while, before discovering that the kids have some musical talent. Suddenly, he has a plan to turn them into a rock group to win the Battle of the Bands. The kids co-operate gladly, even helping him to stay one step ahead of the grumpy headmistress, as they learn all there is to know about rock music.
