Score is a young street kid from New York city. Helaine is a fierce girl-warrior from the medieval planet of Ordin. And Pixel's a virtual reality junkie from Calomir. These seemingly ordinary kids have no idea of their magical talents until an unknown force takes them far, far away from their homelands. Their magical journeys take them to strange planets all over the Diadem universe. Danger awaits them at every turn as they battle sea monsters, cunning sorcerers, trolls, giant insects, fearsome carnivorous plants, and skeleton armies. They also make a few friends along the way: Oracle the guide who speaks in rhyme, a handsome unicorn called Darkstar, Shanara the wizard and her sleepy red panda, and another magic user named Jenna. Score, Helaine, and Pixel become fierce magical warriors as they learn to use their powerful magical abilities. But the quarrelsome trio don't always get along. Banding together is their key to survival and discovering who brought them here. Can they find their way to friendship before the ultimate battle with the evil Diadem rulers?