When Mallory cannot decide what to be on Career Day, it makes her feel like she is not good at anything and she ends up telling a lie that quickly gets out of control.

When Mallory is appointed to the Fern Falls Elementary School Environmental Committee, which is deciding on class projects for the upcoming Green Fair, she rapidly succeeds in alienating her classmates, friends, and family by her overzealous efforts to save the planet.

After moving, eight-year-old Mallory struggles with being new at school, especially because her mother is now the music teacher and director of the third grade play.