An over scheduled Polly bites off more than she can chew when she tries to help Peanut, the local baker, make countless cupcakes. But when she loses her locket in the process, she realizes the importance of slowing down and taking time for herself.

Polly and pals must stop Griselle's mayoral quest to put Littleton in a dome, but their efforts are hampered by Polly's locket being on the fritz. Polly must team up with newcomer Nicolas to repair the locket to defeat Griselle.