In Yuncheng, a giant city shrouded in industrial waste gas and neon lights, the boundary between reality and illusion has long been blurred. When a supernatural creature or human dies, their memories, skills, and even emotions condense into a crystal called "Echo."
Chen Gu is a "scavenger" struggling at the bottom of the city. His job is to sneak into the polluted "grey fog area" and recover these "echoes" from monster corpses in exchange for a meager livelihood. He is cynical, speaks harshly, and uses sharp thorns all over his body to wrap up the remaining warmth deep in his heart.
During a routine "recruitment" mission, Chen Gu accidentally obtained an unprecedented golden "echo" from the corpse of a mysterious humanoid creature. This "echo" not only brought him strange memory fragments and uncontrollable power, but also involved him in a huge conspiracy sweeping the entire city.
Chaebols, gangs, city guards, mysterious "doctor" organizations... All forces were like sharks smelling blood, rushing towards him one after another. In order to survive, and to protect the only people around him, Chen Gu must put on a fake smile mask, say the cruelest words in the most "cheesy" tone, and walk on the edge of death.
He devoured "echoes" and suffered the erosion of memory. He couldn't tell who he was, Chen Gu, the body picker, or the countless dead souls screaming in his mind.
But when the gray fog envelopes the entire Cloud City, and when the old order collapses under the conspiracy, this scavenger, who is regarded by everyone as an ant, will burn out his soul and turn into the last ember that pierces the darkness.
