Hania, an eleven-year-old girl, who believes in pixies, becomes the object of ridicule. In order to save the fantasy world she created with her recently deceased mother, she must prove to everyone that the fairy-tale creatures really exist. Together with Michał, a school outsider, they meet Sindri, a pixie living in the nearby forest, who promises to help them. An adventure full of twists and turns begins, during which Hania learns the power of friendship, the negative effects of lies, and finally comes to terms with the loss of her mother.