Qingyan Town is forever shrouded in thick fog, and a series of "trace-free" disappearances have taken place. The victims seem to have been erased, leaving not a single trace behind. Amid the panic, the ancient legend of the Shadow-Eating Ghost has resurfaced. Lin Yu, a criminal investigator saddled with a "probationary" blemish on his record and suffering from claustrophobia, is "exiled" here to investigate, only to become mired in bureaucratic quagmires and open threats.
Su Yao, a journalist following the story, is drawn into the maelstrom when her friend Li Hong goes missing. Though they don't trust each other, the two join forces and painstakingly piece together the clues: traces of the mysterious "X substance"; every victim hearing voices and mysteriously heading for the mines before disappearing; the bizarre vanishing of the mayor's son; and forensic reports erased by a "ghost" in the System... Every clue points to the suspicious "Shadow-Eater Mine Disaster" twenty years ago and the man behind it, Chen Hui, a seemingly respectable philanthropic tycoon.
Deep in the heart of the fog, the abandoned mine tunnels become a bloodthirsty maze. Mutated creatures, deadly traps, and whispers from the dead close in at every turn. When Lin Yu and Su Yao finally tear open the truth and witness the hellish madness of Chen Hui's experiments to achieve eternal consciousness using mine radiation and "compatible subjects," they discover that the technological shadow behind the "trace-free" disappearances is far more terrifying than any ancient specter. The fog may eventually lift, but the wounds are already etched deep, and the life-devouring "shadow" has never truly left...
