故事背景是中华民国，当时国内最大的兵工厂发生了一起让人匪夷所思的案件，有人在工厂里面被杀害了，但是四处都找不到个头。一时之间，人心惶惶都在讨论着这一颗幽灵子弹，热血警探郭追他想要为民除害，并不喜欢当时警局贪污腐败的氛围，于是和老路调查了这一起离奇的命案。这个案件原本是由警局内部负责管理档案的政务警察松东路调查的。老路他担任文职，自然也不会拳脚功夫，也不会开枪，对于各种打斗的反应能力也比其他人要差一些。他的思维非常的缜密，疑难答案对他来说也并不在话下。老路就想怎样让子弹在穿入肉体的时候消失，他们两个人在羌河子弹上面做了很多的研究，包括像猪的身体发射各种各样特殊的子弹，却没有任何满意的效果，最后他们觉得自己是思路错了，换了一个思路，于是豁然开朗

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 realized