Lu Guanghai, a team leader, was disciplined after making a mistake during a mission. Unwilling to accept it and stubbornly set in his ways, he decided to quit leading teams and opened a detective agency instead. With help from friends and connections, the business took off, and he quickly made a name for himself as a celebrated detective in Xingbei City. The cases included the murder of a young girl, an abduction, a bone-scraping murder, a school drug-and-sex murder case, the dismemberment of a teenage girl, a headless horseman case, and a young girl's doll case. The culprits were all abnormal, deeply twisted individuals. Huang Xinting, Lu Guanghai's childhood friend, is skilled at reading people and works as a psychologist. Liu Meilong and Guo Jiakai are members of the investigation team. Though they sometimes have everyone laughing over trivial matters, they have never once failed on a mission. Zhang Meijuan is a forensic pathologist. She is intensely focused at work and often gets lost in thought over a single detail. Her exceptionally keen powers of observation always provide Lu Guanghai with crucial clues.
