Stolen magic is the most dangerous kind. Jason Becker plays guitar—not that well, but he's learning—and he's joined a garage band with three other kids from his high school. He's especially impressed by the band's singer and songwriter, Erin Kavanagh, a mysterious girl who didn't grow up in their small town. With lots of enthusiasm but a so-so ability level, the band can't manage to land a gig, and their prospects are looking dim. Then Jason discovers a secret supernatural world when he catches a little green goblin robbing his home. He pursues the sarcastic, pint-sized monster into the dreamlike land of Faerie, where magical Folk of all kinds live, play, dance, and snack in colorful stone cities, treetop suburbs, cutesy flower-filled villages. Menacing storybook creatures and giant beasts stalk poisonous green jungles and sugary brown swamps. Jason returns to the human world with enchanted instruments whose music humans can't resist. Soon the band draws large, strangely adoring crowds, and the band members are having the time of their lives. They almost can't stop playing, as though under a spell themselves. They ride the runaway magic to a level of popularity they never imagined, but they can't control the supernatural powers they've unleashed. Their shortcut to success has also gained them a fearsome enemy—Queen Mab, empress of Faerie, ruler of all the magical Folk, and also a bit of a narcissist. The Mad Queen is determined to find and punish these humans who dared to take magic from her realm, even if she must send her most ruthless and wacky monsters to hunt them down.