Harmony is given an old music box on her seventh birthday and quickly discovers how the vibrational power of music can transform situations of conflict into peace.
| Actor | Role |
|---|---|
 Madison DavenportHarmony Parker | Harmony Parker |
 Allen BurnsMartin Parker | Martin Parker |
| LLance NorlingRobbie | Robbie |
| SSelma PinkardMrs. Shield | Mrs. Shield |
| JJoe GellerCarl | Carl |
| RRobert OldingSalvador | Salvador |
 Kevin GlikmannRoach | Roach |
 Danielle KennedySevine | Sevine |
 Anthony Ray ParkerJohn | John |
| JJamie VarneyMatt Songer | Matt Songer |