born by life
in the early 1990s, du xiangdong, who was trapped in the detention center with the ideal of a criminal police officer but was trapped in the detention center, accidentally discovered the extraordinary knowledge and manufacturing ability of the prisoners xu wenguo and yao binbin, and admired it very much. however, as the investigation deepened, the case of the two secretly developing firearms and suspected of killing li chao, the workshop director of the sixth machine factory, surfaced. zhang xiang, a former classmate, was founded.