Late at night, fifteen white bones arranged in strange patterns were discovered in the sewage treatment tank of an abandoned chemical plant on the outskirts of the city. There were no clothes or accessories at the scene. The bones had been specially treated and were more than ten years old. Forensic doctor Qin Feng was ordered to conduct an examination. On the nearly "clean" bones, he discovered a brand-new black button that did not belong to any of the deceased, as well as a mysterious symbol deeply carved into the pubic symphysis. This is by no means a simple dumping of old cases.
Pressure came from all directions. The superiors had a deadline to solve the case, and the media was chasing rumors. However, Qin Feng's preliminary report was temporarily withheld due to too many doubts. When he tried to investigate further, the evidence room encountered a mysterious theft, and the target was the black button. At the same time, a stain on his career - an old case that was labeled a miscarriage of justice three years ago - was brought up again anonymously.
The bones are silent, but they seem to be roaring. Qin Feng realized that what he was facing was not only a ruthless criminal who had been carefully planning for more than ten years, but also a web of darkness that had been woven and shrouded in him. He must trace the names behind the skeletons in the fog, identify friends and foes in the traps, and what the moonlight illuminates is the truth or a deeper evil.
