In order to investigate the disappearance of his twin brother Sun Xiaohu, Sun Xiaotu participated in the police recruitment exam, but was involved in the assassination of the police chief at the exam site. Fortunately, with the help of his brother who has always existed in the form of a soul, Sun Xiaotu was able toescape danger. The assassination of the director also involved a criminal group led by renowned neuroscientist Bi An, who attempted to control the upper echelons of society and the city by transplanting insect bodies that carried souls. thisA conspiracy was uncovered by Xiaohu and his girlfriend, Inspector Xia Bing, and the mystery of Xiaohu's disappearance was also solved. Due to the phagocytic reaction that occurs during insect body transplantation, only one small paste and coating that underwent insect body implantation surgery can survive,Faced with Bian's threat, Xiaotu chose to commit suicide to revive Xiaohu, but was shot dead by Xiaohu to save Xiaotu.