After being kicked out of a rock band, Dewey Finn becomes a substitute teacher of a strict elementary private school, only to try and turn it into a rock band.
Dewey Finn is a hell-raising guitarist with delusions of grandeur. Kicked out of his band and desperate for work, Dewey impersonates a substitute teacher and turns a class of fifth grade high-achievers into high-voltage rock and rollers. The private school’s uptight and skeptical head, Principal Mullins, watches on as the ‘new sub’ preps the kids for Battle of the Bands.