He's hearing voices . . . from another world!
Tommy Frazer's dad just got married. Now Tommy's got a new mum. And he's going to a new school. But it's hard making friends. And his new school is so big, it's easy to get lost. Which is exactly what happens.
Tommy gets lost - lost in a maze of empty classrooms. And that's when he hears the voices. Kids' voices crying for help. Voices coming from behind the classroom walls . . .