Fun with pink-haired Stephanie, an optimistic eight-year-old, and superhero Sportacus, as they learn how to make healthy choices and get active. Robbie Rotten forges some pages of Stephanie's diary and shows it to her friends in LazyTown. They are very angry at Stephanie for writing nasty things about them. Stephanie doesn't understand why they are so upset but, with encouragement from Sportacus, Stephanie shows them what is really in her diary. Everyone has a change of heart, even Robbie.