In the ether-driven giant city "Sky Sail City", the roar of the psychic furnace is the heartbeat of civilization. People praised the prosperity brought by machinery, but no one heard the dying cry coming from the depths of the metal skeleton.
Gu Changan, a third-rate "lawyer" who lives at the bottom of the city with a lot of debts, has learned all his life to "repair" those malfunctioning psychic machines. He can understand the complaints of the gears and soothe the "emotions" of the pipes.
He thought his life would be spent on oil, wrenches, and never-ending bills, until he accepted a maintenance commission from uptown that paid a ridiculous amount of money.
When he reached into the core of the gorgeous and ancient private furnace, what he touched was not cold metal, but a... Crying "soul".
From that moment on, the true face of the world peeled off before his eyes. The glorious city turned out to be a magnificent prison, an eternal furnace burning with forbidden fuel. And he, this humble adjuster, became the only one who could hear the "prisoner"'s screams.
When the pursuit of nobles, plutocrats, and churches ensues, Gu Changan's only choice is to use his hands that repair machines to perform a surgical operation on this terminally ill world.
"Your throne is rusty." He smiled and said to those high-level people, "And I happen to be able to remove the rust."
