A mysterious letter, a bizarre murder, a city that seems to have been deliberately forgotten.
Forty-two-year-old Zhou Ye was just an ordinary person stumbling through life. But when he was accidentally involved in a strange case, unexplainable mysteries began to appear one after another.
Someone disappeared out of thin air without any trace of their existence.
Some people have died long ago, but they are still leaving their traces in different places.
The seemingly unrelated cases gradually pieced together into the same picture through the investigation of detective Lin Lan and Zhou Ye's experience.
All clues ultimately point to a name that has never been made public and has never been confirmed to exist.
**Observer Project. **
As the investigation deepens, they discover that what is really being traced is not the murderer, but the truth itself.
When cracks begin to appear in reality, when memories become unbelievable, when every choice seems to have been arranged...
They finally realized that perhaps someone had been watching them silently before the story began.
And every page you turn may be part of this observation.
