In the steam city "Augustus" shrouded in thick lead clouds and eternal fog, the light of human reason is like a candle in the wind. Huge brass gears drive the pulse of the city, and alchemy and mechanical engineering form the cornerstone of civilization. However, under this city that prides itself on reason and order, there are crazy ravings that mortals cannot understand.
The old rulers from across the star sea whisper in their sleep. Their dreams penetrate reality, distort time and space, and pollute people's hearts. Some people regard this madness as a divine revelation, and by listening to forbidden voices and touching the power of the abyss, they become "secret ones" who master extraordinary power. They climb along a path called the "Abyss Sequence," costing their sanity and humanity at every step.
Ye Linchen, a body collector living in the "rust area" at the bottom of the city, is responsible for dealing with the deaths that no one cares about. He was born with the ability to see the "thread of fate" that ordinary people cannot detect, which is considered a curse. During an ordinary mission, he accidentally discovered an incomprehensible "faceless corpse" and obtained an ancient pocket watch that stopped moving from the corpse - the "Clock of Eternal Night".
