Description：Kennedy's assassination has become an unsolved case in American history. The film re-examines that period of history. Was the killer an ordinary person or a huge political conspiracy? The truth and illusion are gradually revealed during the investigation. Within two hours of the president's assassination, the official murderer was arrested. He was Lee Harvey Oswald. However, coincidentally, the suspect was quickly killed by a gangster in the following hour. After investigation, the official still identified Lee Harvey Oswald as the real murderer. However, three years later, an American district attorney Jim Garrison (played by Kevin Costner) discovered the strangeness of Kennedy's shooting, and thus speculated that the official misjudgment of the year. Next, his investigation was implicated in a shocking conspiracy in history.