Lu Yuan, a young detective in Qinghe County, joins the Demon Suppression Division to find out the cause of his father's death. He uses "Shanhe Crime Record" to kill demons and solve the case.
He initially thought that demons were the source of the troubled times, but later he discovered that human dignitaries, Jianghu sects, and the royal family's longevity magic were all using demons to cause trouble.
When he uncovered the truth of the "Mountains and Rivers Bone Sacrifice Case" step by step, he discovered that the so-called dragon veins of the Daxuan Dynasty were actually the bones of an ancient demon god.
What the Demon Suppression Division suppressed was not the demons, but the crimes that the entire dynasty did not dare to make public.
If the demon is guilty, kill the demon.
If people are guilty, kill them.
If the dynasty is guilty, the country will be judged by the crime record.