Mariposa becomes the Royal Ambassador of Flutterfield, and is sent to bring peace between her fairy land and their rivals, the Crystal Fairies of Shimmervale. While Mariposa doesn't make a great first impression on the King, she becomes fast friends with his shy daughter, Princess Catania. However, a misunderstanding causes Mariposa to be banished from their fairy land. As Mariposa and Zee returns to Flutterfield, they encounter a dark fairy on her way to destroy Shimmervale. Mariposa