Double Indemnity is a noir film made by Billy Wilder in 1944 and is regarded as one of the best screenplays in American history. This film is adapted from James Caine's 1943 novel of the same name, and was transformed into a movie script by Billy Wilder and Raymond Chandler, simplifying the complex four-corner relationship in the original work. The film was collected by the Library of Congress in 1992 because of its cultural value.

 Content: Walter is an insurance salesman, driving on the highway late at night, and then surrendered in the office, slowly telling the story through confession: he became involved in the murder of a femme fatale after he met Felice Husband's plan. Felis, who is always dissatisfied with the status quo, approached Walter because she had been trapped in a boring middle-class family for a long time, had a poor relationship with her husband and stepdaughter, or was extremely eager for money and social status. Charm other men to fulfill her goals.

At first, Walter was dissatisfied with her idea, and tried to persuade Phyllis with the case of failing to claim accident insurance by murdering her husband; however, Walter couldn't help but kissed her and became controlled by Phyllis. Become a tool for Phyllis to kill her husband. The murder was successful, but there was no good end. Walt asked his colleague Case, who had stood "enough" outside the office door, to pretend that he did not "discover" the murder until the next morning. He would have 4 hours to escape, but Case refused. . The wounded Walter hobbled away, fell to the door a few steps away, fragilely making the final struggle-but the cause of the tragedy was his own decision.