This film, which is positioned as a thriller by most mainstream media, is quite different from the traditional detective film: it is an inconclusive detective film. In the film, the two detectives who were directly involved in the incident and the two investigative reporters of the "New York Times", since they walked into the incident and became obsessed with it, they determined that they would have a good relationship with their careers and even their private lives. Branded with a devastating mark. This is what the film really wants to tell.
The film continued the noir style of director David Fincher, and was commented by the Philadelphia Weekly as "fear and anxiety perfectly run through the story."
The film presents the psychological trajectory of each person in it in a tentative manner-the identity of the "Zodiac Killer" is ultimately inconclusive.
