Thirty years ago, both parents were killed, and the true identity and motive of the perpetrator remain a mystery. Private detective Chen Qiang traced them all the way to Malaysia, only to find out the cause of their death. However, the relationship between him and his parentsPlease remind the person to recall the contradictions and dissuade him from continuing to investigate. During this period, Chen Qiang's home was also inspected by someone entering the room. In a situation of isolation and helplessness, he sought help from the local private detective Zheng FengxiHe assisted in searching for the background of related individuals and the whereabouts of certain important figures. Zheng is currently anxious about his younger brother's situation, but he cannot resist Chen's provocation and resolutely accepts the commission. But from the one who started the investigationFrom the beginning of the day, various dangers followed closely. The evil shadows intertwined with drugs and desires, the two detectives with their lives hanging on the line gradually approached the truth of the past