Misadventures of Dewey Finn, a rocker who poses as a substitute teacher at a prestigious prep school as he teaches his unconventional and overachieving students to play and love rock 'n' roll. Something that outweighs。 Misadventures of Dewey Finn, a rocker who poses as a substitute teacher at a prestigious prep school as he teaches his unconventional and overachieving students to play and love rock 'n' roll.