The young man pondered on the bench in Minghu Park and decided to head to the "target" late at night. Detective team leader Xu and his colleagues were having supper at a street corner restaurant when they noticed a suspicious young man. Da Xu arranged for tracking, and the young man fled into the community. Eventually, he was subdued and found carrying a bloodstained fruit knife, cash, and a mobile phone. Da Xu comforted the robbed woman A Fang and took the young man back to the police station. Young people confess their criminal motives during interrogation, commit crimes due to life pressure and escapism, and are ultimately sentenced. The story reveals the story behind the 'Night Walker' and the serious consequences that a momentary lapse of thought can lead to.