At the end of a sparkly visit from her cousin Violet, Princess Bella is throwing a party to celebrate Violet's week in Crystal Kingdom. But an unexpected guest showed up at the party: Bella's aunt, Queen Fire, who rules over the Dark Forest. There is a magical crystal hidden deep inside Crystal Castle--and Queen Fire wants Bella to find it. It holds special memories that the queen wants to have back. And if Bella doesn't get the crystal, Queen Fire will take Glimmer away!