Setsuka Honoka, after years of hiding, has finally returned to her birthplace in order to finish her last years of schooling. She expects to run away from those wasted moments but her past comes to haunt her when a new Company called the 'Music Cage' seeks to find her and expose her. From her past, she has brought a dark secret. After years from hiding she decides to fight this new force. Together, with The Guardians, they must face this new threat against all odds to stop the domination of the World's Destruction of Dreams. Will they be able to save the World's Song in time...?