The Chronicles of Tarmania: Curse of the Blue Diamond

When she was five years old, her village was struck by lightning and burnt to the ground. Katie was the only survivor. She found herself without her family living in a treehouse with a bunch of other kids in the middle of the jungle. One day, an unknown kid stumbled upon their tribe. He had possession of a blue diamond which he gave to Katie, making her swear to protect it. What she didn't know was that the diamond was magical, that there was a whole other world full of magic, and that she was about to risk her life to protect them both.