Allen portrays Isaac Davis, a successful comedy writer whose wife, having left him for another woman, is now embarking on a book about their failed marriage. Isaac happily consoles himself in the arms of an adoring 17 year-old schoolgirl until he meets someone closer to his own age, who happens to be his best friend's mistress.

This spoof of documentary films stars Woody Allen as Leonard Zelig, the famous "Chameleon Man" of the 1920's, whose personality was so vague he would assume the characteristics of whomever he came into contact with. Filmed in black-and-white, the movie simulates the look of a newsreel, complete with stentorian narration.