When the bones of civilization turn into dust, memory becomes the most deadly poison.
In an apocalypse shrouded by the "dust of oblivion", those who come into contact will lose their minds and become soulless "empty shells". Young Rin is one of the very few "dust whisperers" who can hear the secret words of the past from the dust.
In order to save his terminally ill sister, he must sneak into the "Sky Vault", the last bastion city of mankind, to find the legendary "source code" that can purify everything. In this steel cage where order is his belief, he meets Ella, a girl in the system who longs for the truth, and is forced to form an alliance.
Behind them are ruthless hunters who represent absolute order; in front of them are lies that have been dusted for hundreds of years and are enough to subvert the entire world.
Every breath is accompanied by deadly dust, and every listen may make humanity sink. Rin's choice will determine whether this wasteland will return to silence, or whether it will usher in a new echo among the ashes.
