A vicious serial murder occurred in a small county, and all the victims died in extremely tragic circumstances. This caused panic among the people, and the superiors demanded that the murderer be caught within a week, but the murderer's counter-reconnaissance ability was super strong, and even after several days, nothing was found. At this time, another citizen was killed while everyone was confused. This time the murderer even sent the video of killing the victim to the police station... When the murderer was surrounded on the roof of the building, the murderer jumped down, leaving only a diary to explain everything.
Concept: There is no wall that is airtight in the world
