The school's annual fundraiser is on, and the best chocolate seller gets a sweet reward: a brand-new tablet computer. Mia and Paula are determined to help Vincent win, but they soon discover Violetta has a devious plan to take the prize. In Centopia, Yuko tries to get some quiet time alone with Mo, but she's frustrated with Mia's constant interruptions. Yuko does her best to ditch Mia, but when she and Mo are trapped by a landslide, they'll need Mia's help more than ever.