The murder case of street sweeper is confusing, and there is no trace at the crime scene except a note that says street sweeper, which also makes the investigation deadlocked. Professor Bu's daughter died in a car accident. After losing his daughter, Professor Bu was in great pain and determined to avenge her daughter. After finding out that the murderer was Zhang Jun, Professor Bu killed Zhang Jun. However, I was surprised to learn that Han Tianfeng was a scavenger. Professor Bu asked Han Tianfeng to surrender, but Han Tianfeng refused and finally killed Professor Bu.

abstract

Qin Ming, the god of forensic medicine in Longpan City Police Department, became famous with superb professional skills in an overseas case. He should have gone further and further on the road of the cold male god, but subtle changes have taken place because of the appearance of the new forensic assistant Chen Shiyu. Qin Tao, an inseparable "golden partner", is even more powerful in his work because of female forensic's participation.

The expedition composed of three people experienced bizarre and tragic scenes again and again, and avenged the complex case in Longfan City through the clues on the body. However, the growth of evil is hard to stop, and a ghostly killer suddenly rises in the city. This person's whereabouts are difficult to distinguish, leaving no traces of committing crimes, and even arrogantly leaving a bloody signature at the scene of the murder-the street sweeper, the nightmare of Longpan citizens began.