Ernest and Oliver love hearing bedtime stories told by Father Rabbit, but their world at the Hollow is turned upside down when the story of The Lost Prince of the Forest becomes real. The whole rabbit family, together with a squadron of birds, embark on a quest to bring Prince Henry, who has been transformed into a giant, home to his parents at the castle as a normal boy. The key to their success is to locate a magical snowberry that grows in a corner of the enchanted forest and then to bake the snowberries into a pie, a magic pie!