Mia is a normal 12-year-old girl, living in a boarding school in Florence, Italy. But she owns a mysterious book and a magic bracelet that allow her into the wondrous world of Centopia, a realm full of Elves, Pans and Unicorns. Here she is transformed into a beautiful Elf with a unique skill: She is the only Elf in Centopia who can communicate with the Unicorns.
The pretty Elf Yuko lives in Centopia too, and she is close friends with Prince Mo and Mia. Yuko is one of the best warriors in the kingdom. She takes care of the Unicorns and rescues them from any danger. She is in constant competition with Mo about who is the better waterglare shooter.