The old case is over, but a new case has arrived.
Six years ago, legendary criminal investigation consultant Chen Qingshan was imprisoned for "protecting a murderer" and died mysteriously in prison. A case of disappearance from a secret room in Wutong Lane was subsequently closed.
Six years later, in the old city where heavy rains continued, a perfect secret room reappeared at the same address: blood stains, empty corpses, and handless pocket watches, all replicating the scene of the year.
Shen Yan, a former detective apprentice trapped in hatred,
Lu Chen, the deputy captain of criminal investigation who holds power but hides guilt,
From being in opposition to being forced to join forces, the two formed seven criminal investigation teams with the cold-blooded forensic doctor Su Qinghan, Wei Wen, technical investigators, and field officers, and stepped into layers of fog.
The deceased was a copywriter who held a secret for ten years.
The murderer is a desperate victim;
But when the secret room was exposed and the truth emerged, they were shocked to realize:
All revenge, all plots, and all deaths are just the tip of the iceberg of a larger sinister plot.
High IQ crimes are intertwined.
The shadow of the old case is always there.
This time, they want to find out more than just a murder case,
There are also the justice, sacrifices and lies that were buried back then.
The rain will stop and the fog will disperse,
But some crimes must be pursued to the end.
