Phantom Punch

In 1950 Liston is carrying out a prison sentence in Missouri State Penitentiary. After knocking out the prison boxing champ Big Lester in a brawl over cigarettes, he is coached by the prison athletic director Father Alois to hone his boxing skills. In the ring he knocks out Big Lester again followed by several other contenders. Having shown improvement, he is released after serving just two years of a five-year sentence.