Regional background: Taking the fictional southern coastal city "Nanzhou City" as the core, it covers scenes such as prosperous urban areas, dilapidated old cities, suburban fog bridges (symbolizing suspense and reunion), abandoned factories, remote fishing villages, seaside B&Bs, etc. Different scenes carry specific functions, such as the fog bridge triggering reunion and a sense of fate, the old town hiding clues to old cases, and the seaside B&B hosting a romantic trip after marriage.
Industry background: In-depth presentation of the details of the operation of the public security system, including the autopsy process of the forensic department (toxicological analysis, identification of trace evidence), the case detection mechanism of the criminal police team (on-site investigation, suspect interrogation), and the internal power relations of the police station; it also presents the professional dilemma of forensic medicine (psychological pressure, public misunderstanding) and the dangerous daily life of criminal police officers, enhancing the authenticity of the story.
Timeline setting: Adopt "present tense (70%) + memory killing (30%)" interweaving mode. The present tense focuses on the detection of new cases and married life, and the flashbacks are interspersed with key moments of childhood, adolescence, and youth (such as a childhood fever and hospitalization, a teenager's rain in camping, and the first cooperation of young people in internship), and the interweaving of time strengthens the bond between the characters and the tension of the plot.
