Four orphans have escaped from the Home for Friendless Children. One is Lucy, who used to talk and sing. No one knows why she doesn't speak anymore; silence is her protection.

The orphans find work and new friends at a traveling circus. Lucy loves caring for the elephants, but she must be able to speak to them, and to warn others of danger. If Lucy doesn't find her voice, she'll be left behind when the circus goes on the rails. Meanwhile, people are searching for Lucy, and her puzzling past is about to catch up with her.