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.