"Martina's always struggled to carve out her place at school, but she finds tremendous excitement in a treasure all her own: a sticker collection that comes to life!"

Mia and Bev find another sheet of magical stickers, and soon Mia finds herself running for class president but worrying that she is losing her new friend.

Student council is keeping Martina busy with a bake sale and cupcake-savvy Bev is excited to help out. The girls advertise their delicious creations and are thrilled to be invited to participate in a web show baking contest. Can Martina balance school and a ruthless cupcake competition, all while keeping her stickers in check? Or is this a recipe for disaster?