In the hidden Valley of Lingering Sounds, a young boy named Finn has a special job: he is the Echo-Tender, caretaker of the happy sounds that have settled there to rest. When a mysterious “Fade” begins to silence the echoes, turning them grey and voiceless, Finn must journey out of his peaceful home to find the source of the great Noise that is causing it. With only a shy Hush-Bunny for a companion, he seeks the legendary Heart-Note, a perfect harmony said to be able to restore any sound. His quest will teach him that this perfect sound is not something to be found, but something to be created from the quietest, kindest parts of the world.