So far, fifth grade at Lake Harriet Elementary School is not exactly a thing of joy. Julia Gillian's best friend, Bonwit Keller, is keeping a secret from her. Trumpet lessons with Mr. Mixler, her favorite teacher, are much harder than expected. And most upsetting of all, the kind lunch lady has been replaced by a tyrant known as the Dumpling Man. Where is the joy? Amidst all this, Julia Gillian starts keeping secrets of her own — secrets that feel an awful lot like lies. To set things right, she will have to learn a little bit about friendship and honesty.