Popular film lore has it that The Jazz Singer was the film that established the talkie as the pre-eminent film medium in 1927. But it was Al Jolson's follow-up film, The Singing Fool that actually introduced the sound film to the general film-going population of the United States and it was the popularity of The Singing Fool that paved the way for the wide-acceptance of sound features. Jolson plays Al Stone, a singing waiter at Blackie Joe's cafe, who writes a hit song and sky-rockets to success as a Broadway headliner. Looking ahead to unlimited success, Al falls in love with scheming golddigger Molly Winton (Josephine Dunn), whom he marries. When Molly gives him a son, Sonny Boy (Davey Lee), Al is beside himself with love for his cutey-pie offspring. But when Molly deserts him for small-time gangster John Perry (Reed Howes) and takes Sonny Boy with her, Al is heartbroken. His spirit shattered, Al becomes a bum and, after a time, regains his singing waiter job at Blackie Joe's. Back at the dive, Grace (Betty Bronson), a cigarette girl secretly in love with Al, convinces him to make a comeback. Al struggles and regains his confidence and hits the stage like a trouper -- even when he hears that his beloved Sonny Boy has died in a hospital ward.