This movie is actually adapted from a real case. There really is such a generation of unsolved cases in American history, and it has been adapted into movies more than once. David Fincher’s one is undoubtedly the most exciting. Just as the Zodiac Killer himself expected in the movie, his life really became a wonderful movie. When the audience in the movie watched his story, they forgot that this was a real murder case that happened around them. It was so terrifying. .