When fourth-grader Jon Gummyshoes is framed for stealing a video game from the principal's office he needs to use his detective skills to expose who framed him--and why.

Immediately after switching schools, Jon Gummyshoes, fourth-grade detective, is confronted with a new case--someone is trying to sabotage one of the bands in the upcoming Battle of the Bands by threatening the lead singer.

There is a new student at school who has most of the other children awed with his magic tricks and his claim that he can mind-read, but Jon Gummyshoes, fourth-grade detective, is determined to expose him as a fraud.