After a hard day's work, the reporter Moreau is asked by his boss to find out why the head of the French delegation to the United Nations has suddenly disappeared. Moreau drags out of bed the unscrupulous photographer Delmas, who knows his way round Manhattan at night. Together they visit women the diplomat knew: an actress in a play, a jazz singer in a recording studio, a stripper in a burlesque show, a prostitute in an expensive brothel.