Sofia the First: The Mystic Isles Movie Synopsis:
According to Disney:
In the TV movie event, Sofia and Amber visit an enchanted new world called “The Mystic Isles” where they encounter some magical new friends, including an enthusiastic unicorn named Skye and mystical human/hawk creatures called Windwalkers. Together with their new friends, Sofia and Amber must stop an evil Crystalmaster named Prisma from covering the isles in crystals.
Sofia the First: The Mystic Isles Movie Trailer: