After moving to another town, eleven-year-old Hania must navigate a completely new environment. She has no friends, and her belief in the existence of elves exposes her to ridicule from her peers. When the girls in her class steal her medallion—a priceless family heirloom—Hania decides to get it back at all costs. To achieve this, she must prove that elves are real. Michał, a school outsider and young inventor, aids her in this adventurous mission. Thanks to his support, Hania will once again open up to the world and understand that true magic lies in friendship.