Determined to prevent the prophecy of the Fortune Jewel from coming true, the Jewel Riders travel to the Heart of Avalon to seek out the wisdom of the Lady of the Lake. For this they need the help of the Grandfather Travel Tree, the only one who can send them where they need to go; Lady Kale and Morgana get there first, nearly destroying the tree. Luckily the Riders are able to heal it, and the girls go through its magic tunnel to the shore of the mysterious Isle of Myst, where they are ambushed by Kale and Morgana who turn almost everyone to stone. Only Gwenevere and Sunstar escape across a magical lake, where she is given the magic Staff of Avalon and instructed go to the center of the Wild Magic, where she would merge the Wizard Jewels into a new magical jewel for Merlin. With help by Ian, Gwen triumphs in the final showdown against Kale, who gets herself turned to stone, and restores her friends. But Morgana steals the Wizard Jewels and heads to the center of the Wild Magic first.