On the tranquil, azure Sea of Music, two beautiful islands float separately—Symphony Island and Jazz Island. On a clear day, the palace on Symphony Island is, as always, playing elegant and graceful symphonic music, with violin court ladies and harp gentlemen dancing in noble steps. The Violin Queen drifts into a deep sleep amidst the light songs and gentle dances, but the princess by her side feels utterly bored. Seizing the moment when her mother isn’t paying attention, she sneaks out of the palace, leans against the railing, and gazes toward the opposite Jazz Island. There, a lively and boisterous dance party is also underway, presided over by the Saxophone King himself from his throne, beating out unrestrained drum rhythms. The prince beside him seems unaccustomed to the noise, and he too slips out of the palace, swimming over to Symphony Island at the call of the Violin Princess. 　　 The two young ones chase and play, but this scene is witnessed by the Queen. Enraged, the Queen imprisons the Saxophone Prince, sparking a great war between the two islands...