Letters of Death

THE LAW IS WEAK.
In the Chinese city of Chengdu, someone is executing people who have escaped punishment under the law - police officers, officials, ordinary citizens. Each murder is preceded by an accusatory letter indicating the exact time of the... "execution".
I AM DELIVERING MY JUDGMENT.
This has happened before, 18 years ago. Back then, the "executioner" was not found. And now he has returned… A special task force is being urgently formed to capture him - investigators, special forces, and a psychological profiler. This is the police elite, the best of the best. Perhaps the latest methods and technologies of investigation will help stop the wave of bloody murders…
THE SENTENCE IS ONE: DEATH.
But the criminal is incredibly cunning. It seems he calculates the developments of the situation not just three, but thirty moves ahead. Again and again, the police discover his letters of death…