When an ancient evil is released from its centuries-old prison, a crescendo of trouble crashes over the Kingdom of Classical. It takes possession of the king and queen, who in turn try to ensnare young Prince Soprano. But his guardian knight Alto and pet moondragon Mezzo whisk him away. Soon, the trio is on the run and branded as outlaws. Embedded in Alto's hand is the only force that's capable of trapping the evil entity. But how will the prince and his companions even get a chance to use it?