Children's animation about a teenage band that discover a magic note, much to the chagrin of the record company moguls. When Freefonix catches wind that a special violin is to be stolen by Mantis from the Los Bosmos museum, the trio set out to stop the crime, only to be mistaken for thieves themselves. Now on the run, they must protect the rightful heir to the instrument - a young girl who has yet to embrace her destiny as a guardian of the 13th note.