When his band votes him out due to his embarrasing musical antics, Dewey has to make the rent somehow. After intercepting a call for his substitute-teacher roomie Ned, Dewey finds himself in front of a class of elite elementary school students. Dewey decides to take on the music program and makes it his goal to teach them the gospel of rock and roll. His ulterior motive is to get them to compete against his former band for a cash prize.

Sick at home, a young girl misses the costume party at school, so she decides to wear her rabbit costume the next day; but when the other children laugh at her, she is sad--until a boy turns up in his carrot costume, and soon the other children join in their play.