妻を亡くして間もないピアノ調律師の“太田”は、かつて元気だった頃の妻の口癖『私の遺灰は砂浜に撒いてね』という言葉を想いながら、無気力な日々を過ごしていた。
そんなある日、居候先の骨董店<月光密造舎>で、人形遣いの“空蔵”と出会う。
太田は、横柄な態度のこの老芸人を毛嫌いする。
その後空蔵は、出演中の舞台で倒れ入院。
太田は、骨董店の使いで渋々見舞っていたが、大切な何かを失くした者同士の二人は、次第に心を通わせ始める。
やがて空蔵は、【かつて手放してしまったピアノ】を探し出すよう太田に頼み、程なくして亡くなる。
ピアノの行方を突き止めた太田は、空蔵の弟子“千住”と共に、ピアノのある町へ向かう事にする。
亡き妻が残した、【どこか分からない砂浜の写真】を手に。
その出発の朝、太田の前に(空蔵の娘)と名乗る“伽子”が現れる。
いつか吹いてた風の中を、誰かの記憶の音色に導かれながら進むような、不思議な旅が始まる。
The piano tuner Ota is still in mourning for the loss of his beloved wife.
He would like to go on, but he can't find the beach where his wife wanted her ashes to be scattered.
While helping his friend Kojima with his antique shop, Ota meets the old Kuzo, ventriloquist with a mysterious and fascinating female puppet, Aria, and his disciple, Senju.
But during a show, the old man collapses.
At the hospital, he asks Ota to find a piano he sold a long time ago to a pawn shop, and dies.
Ota and Senju decide to look for the piano, even if Kuzo will not be able to enjoy it anymore, as way to carry on the master's memory, one last attempt to understand his half said past.
Just before the departure, a mysterious and beautiful lady enters the antique shop, claming to be the master's daughter. She wants to join them in the quest for the piano.
The three leave in search of the long forgotten piano:
they will meet a number of uncommon characters, who will guide them in journey though the master's past, and their memories, toward the future.

