According to the backstory explained in the opening theme song, Jane was being trained to become a lady-in-waiting but had always dreamed of becoming a knight. When the prince is kidnapped by a dragon, Jane sets out to slay the beast. When Jane brings the prince back, the king makes her a knight apprentice. Jane and the dragon end up becoming best friends. Further details of this early adventure are never explained in the series. They are, however, explained in detail in the book "Jane and the Dragon" by Martin Baynton.