At the end of the 1960s, three comedians changed stand-up comedy—Richard Pryor, George Carlin, and Robert Klein. If you ask Jerry Seinfeld or Jay Leno or Billy Crystal or Jon Stewart which one was the most influential on their comedy, it would be Klein. Now 74 and still performing, Klein offers a humorous look at his daily life, even as the film draws upon a large archive of past and current performances to examine his influences and the way he influenced others.