Jack Benny narrates the Screen Snapshots that, utilizing archive footage, traces the career of Al Jolson, and rare off-stage shots of Jolson with stars such as Bob Hope, Eddie Cantor and Pat O'Brien.

At the turn of the 20th century, young Asa Yoelson decides to go against the wishes of his cantor father and pursue a career in show business. Gradually working his way up through the vaudeville ranks, Asa — now calling himself Al Jolson — joins a blackface minstrel troupe and soon builds a reputation as a consummate performer. But as his career grows in size, so does his ego, resulting in battles in business as well as in his personal life.