The Yin Mountains stretch for hundreds of miles, and Wuluo Town is trapped by the mountains. Generations have adhered to a set of ancient taboos that cannot be seen. The deserted temples are silent, and the bones are hidden. People in the town keep silent about the dusty past. Under every gentle and simple face in the streets, there are rotten sins and secrets buried deep. Civilian case investigator Lu Yan and his partner Chen Jiuchen were ordered to step into this isolated ancient mountain town. An unsolved case in a secret room suddenly kicked off. The old man who guarded the ancestral hall died mysteriously in the sealed ancestral hall. He clutched an animal bone sign with strange patterns in his palm. The strange way of death was in line with the evil ancient customs spread in the area. Everyone pushed the murder case to the theory that the evil spirit in the mountains was responsible. Everyone looks kind and pretends to help each other. The mayor, the town doctor, the villagers, the local forensic doctor, all the seemingly innocent and harmless townspeople are actually hiding evil, each with their own agenda, colluding with each other to cover up clues, deliberately guiding the direction of the investigation, and weaving layers of cages with lies. A series of murders broke out one after another, and the dead were all holding bone markers. Old cases came to the surface, and centuries-old family tragedies were uncovered layer by layer. Goodwill is disguise, compassion is calculation, and trust is a sharp knife. There are no absolutely innocent people, only sentient beings bound by sin. The clues are reversed layer by layer, and the masks are torn apart one by one. The seemingly avengers are just puppets, and the superficial accomplices are all pawns. Even the partners in the same journey are burdened with old blood debts. The protagonist's own life experience is tightly bound to the dark past of this ancient town. There is a buried altar hidden in the depths of the Yin Mountains. The bone sign is not a thing to suppress evil, but a death register that records sins. It spans hundreds of years and is intertwined with hatred, greed, betrayal and destruction. There are murders at every step, conspiracies at every level, and countless shocking reversals that subvert cognition. When all disguises are shattered, no one in this ancient town in the mountains is innocent, and all living beings are evil.
Purpose: All human hearts hide hidden sins, and no one is perfect in this world.
