The background of the story is the Republic of China. At that time, an unbelievable case occurred in the largest arsenal in the country. Someone was killed in the factory, but everywhere Can't find a head. All of a sudden, people were discussing this ghost bullet in panic. The hot-blooded police detective Guo Zhui wanted to eliminate harm for the people. He didn't like the corrupt atmosphere in the police station at that time, so he and Lao Lu investigated this bizarre murder case. . This case was originally investigated by Song Donglu, the government police officer in charge of file management within the police station. As a civilian in the old road, he naturally doesn't know how to punch or shoot, and his ability to respond to various fights is worse than others. His thinking is very meticulous, and the answers to difficult questions are not a problem for him. Lao Lu wanted to make the bullet disappear when it penetrated the body. The two of them did a lot of research on the Qianghe bullet, including firing various special bullets like a pig’s body, but there was no satisfactory effect. They felt that their thinking was wrong, and they changed their thinking, so they suddenly became enlightened