Can you imagine a world without music? That's exactly what happened to young Melody Bell and her two friends, Harmon E. Chord and Justin Time. These three youngsters share their common aspirations to one day become celebrated pop stars!

Their names reflect the three elements found in music: a melody, the harmony, and its rhythm. With that in mind, a magical red disc-shaped contraption, named Middle C, whisks them into space headed for the tiny undetected planet, Mutonia, the music planet. Middle C explains to the threesome because of their musical names, they are the only ones qualified for the important mission called Operation: Restore Music.

Once the youngsters arrive at the entrance of the unique planet, they encounter all kinds of situations, special settings and strange, yet engaging characters, where they become entangled into weird, scary, fearful, but often wondrous experiences.

After much drama, the threesome finally unlock secrets as to why music has mysteriously vanished from their own planet: Earth!