The mountains are rolling and the river valley is silent.
Four years ago, a minor drug trafficking case was settled. The evidence was conclusive, the procedures were reasonable, and the legal principles gave a verdict, but no answer. The young man eventually died in prison.
Provincial department pre-trial Cen Shuo was ordered to go to Shen Lanchuan to investigate the sudden death cases of new drugs that appeared one after another.
Shaodu has been stationed in the border anti-drug field for many years. When he was young, his uncle, who was an informant, went into the mountains to follow clues, but has not been heard from since.
The national border is an invisible gap, and countless clues are interrupted when they reach the border.
One abides by the law and acts based on evidence.
One is rooted in the mountains and wandering in reality.
A sudden series of murders tied the two people together.
Purpose: Legal principles have boundaries, but adhering to them has no boundaries.