A rock 'n' roll band to die for? Callie is about to find out.... Not much happens in fourteen-year-old Callie McCallan's sleepy Massachusetts town. So when the famous rock 'n' roll band, Brass Rat, schedules a concert in the Valley, it's big news. As a reporter for her school paper, Callie scores the scoop of a lifetime—a backstage pass to interview the lead singer of Brass Rat! Her friends are so jealous. But Callie isn't sure what the fuss is all about...until she meets the band. Lead singer Peter Gringras and his band mates are so cool. Especially Peter. When he plays his flute, it's as if he has some kind of hypnotic power. But there is something strange about the band, something Callie can't quite put her finger on. Maybe she's just being weird, but it's as if they're from here—but not from here—at the same time.

It's when, on Halloween night, Callie's little brother Nicky disappears—along with all the other children of Northampton—that she begins to wonder if her suspicions are so weird after all. It's crazy, but Callie thinks she knows why the children have disappeared—and who took them. To prove it—and to rescue Nicky and the other children—Callie will be forced down a road that will lead to her to a mythical world filled with fantastical creatures. A world from which there may be no return....