Emily and Adriane have one thing Kara doesn't—a magic gem. When Kara finally finds a stone of her own—a diamond unicorn horn, no less, it brings more trouble than anyone can handle. Pesky dragonflies start showing up everywhere, and new fairimentals warn of danger. Worst of all, a band of terrifying banshees stalk Kara. All these creatures come from another world, and all want something from her — but what? Finding out may take Kara, Emily, and Adriane one step closer to Avalon, the source of all magic. But it may also cost one of them her life.