Muhammed Ali portrays himself in this biofilm telling the incredible story of his life. As 18 year-old Cassius Clay, Ali wins the Olympic gold medal for boxing. From there, he sets out to win the heavyweight championship under the guidance of trainer Angelo Dundee (Ernest Borgnine). Clay wins the title from Sonny Liston, converts to Islam, and changes his name to Muhammed Ali. He is drafted, but refuses on religious grounds, and find himself in a court battle that still can't prevent him from winning in the ring.