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?

Jenna's stepdad Leo is taking his family on a Caribbean cruise. Unfortunately, Jenna's younger siblings get the chicken pox, leaving Leo with four extra tickets. Enter Peace, Love, and Cupcakes! Leo says Jenna's four besties can come—in exchange for baking twelve thousand cupcakes for his company's pirate-themed event. Shiver me timbers, that's a lot of icing! Now veterans in the cupcake-baking game, the PLC takes on the challenge.

Meet Kylie Carson. She's a fourth grader with a big problem. How will she make friends at her new school? Should she tell her classmates she loves monster movies? Forget it. Play the part of a turnip in the school play? Disaster! Then Kylie comes up with a delicious idea: What if she starts a cupcake club?

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.