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.

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?

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.

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.

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!