To Lexi, a new school year means back to baking with her BFFs in the cupcake club. But the club president, Kylie, is mixing things up by inviting new members. And Lexi is in for a not-so-sweet surprise when she is cast in the school's production of Romeo and Juliet. If only she could be as confident onstage as she is in the kitchen. The icing on the cake: her secret crush is playing Romeo.

Meet Sadie. When she's not mixing it up on the basketball court, she's mixing the perfect batter with her friends in the cupcake club. Sadie's definitely no stranger to competition, but the oven mitts are off when the club is chosen to appear on Battle of the Bakers, the ultimate cupcake competition on TV. But the real battle happens off camera when the club's baking business starts losing money.

New cupcake club member Delaney is shocked to find out her mom is expecting twins! When her parents first tell her, the practical joker thinks they must be pulling her leg. For 10 years she's had her parents—and her room—all to herself. She LIKED being an only child. But now she's going to be a big sis.

Kylie and her cupcaking friends are finally graduating from Blakely Elementary! The other girls of Peace, Love, and Cupcakes are feeling sentimental, but Kylie's all about looking toward the future. After all, PLC will continue on in middle school. But when Principal Fontina asks Kylie to create a PLC junior club to live on at Blakely after graduation, can Kylie find enough members to continue on the club? And will the walk down memory lane be more sweet than bitter?

The fifth graders at Blakely Elementary are having their very first dance! The girls of Peace, Love, and Cupcakes are all thrilled…except for Kylie, who confides in Lexi that she wishes she had a special someone to go with. Before long, notes and gift show up in Kylie's locker from a "secret admirer" who seems to know her perfectly!