A world whose music has been stolen away...
Seeking his younger brother, who was kidnapped five years ago, Ziggy meets Z.E.R.O., a robot deserter from the Mechanical Militia.
Together with Z.E.R.O. and the Superstars who control sound, Ziggy sets out to save his younger brother from the Mechanical Militia and to restore freedom and music to the world – so begins the tale of a new Song Summoner, Ziggy.