On her twelfth birthday, Willa Ward inherits a beautiful charm necklace once owned by her mother, a witch. The gift quickly draws unwanted attention from two bad witches, Wilma and Wanda, who want the locket for its power. As Willa searches for answers about the amulet, she and her best friends, Scout and Lily, discover they can shape-shift into cats and slip into a wicked world of spooky, playful adventures.