A string of bizarre murders has taken place in the city, each one looking like an accident sent by heaven as punishment.
Most of the victims were people who operated in the gaps of the law, their crimes too difficult to prosecute. The scenes were clean, the evidence airtight, and public opinion dismissed it all as people getting what they deserved.
Criminal police officer Lu Zheng plunged into these unsolved cases, dismantling the false appearances one by one and searching for buried clues among the smallest traces.
Along the way, a hazy figure kept appearing at the edges of the various cases.
Shen Xu existed apart from every storm. Quiet and taciturn, he seemed to be no more than a bystander who had happened to pass by.
Two old friends who had once walked side by side in their youth met again, years later, amid one crime after another.
One carried a torch through the daylight, doggedly pursuing the secrets hidden beneath false appearances;
The other walked alone through an endless night, concealing a past no one had ever glimpsed.
Black and white faced off as old acquaintances reunited. They understood each other's obsessions and restraint better than anyone, gazing at one another from afar across the divide of law and the past.
To outsiders, they seemed destined to find their way to each other. But once the layers were peeled back, it was a years-long, unceasing contest to hunt down a killer.
Theme: Even when committed in the name of justice, evil deeds remain a step down the wrong path.