In the sky-island city "Argentum" suspended on a sea of poisonous miasma, the glory of technology is being quietly corroded. The "spiritual engine" that maintains the life of the city is declining day by day, while the "Cardinal Council" of the ruling class is whitewashing peace with lies.
When a top craftsman dies mysteriously, Lian, a former inspector who was expelled from the system, is forced to return to his old profession. He joins forces with Kaelen, the deceased's genius disciple, to try to find the truth in the fog. However, what they uncovered was not only the murderer, but also a shocking conspiracy that could plunge the entire world into the abyss.
From the invisible bottom of the city, to the crisis-ridden miasma sea, to the core of the pinnacle of power, Leng must face not only his former colleagues, out-of-control machines, but also a madman trying to become a god. More importantly, he must face the taboo power he has been avoiding - "resonance", and make the final choice between "destructive truth" and "false stability".
This is a sad song about brass, gears and souls, a story about struggling on the edge of the end of the world and exploring the boundaries between humanity and technology.
