Tells the biography of Jack Doyle, the Irish heavyweight boxer and singer who enjoyed a meteoric rise to fame in the 1930s. The love of Doyle's life was the Mexican film star Movita, who later married Marlon Brando. When Doyle's star was in the ascendancy in the 1930s and 1940s, the couples' fame matched that of the Burtons. Doyle was the darling of the boxing ring and the gossip columns, who attracted a quarter of a million people to his last fight in London, in July 1939. It was the height of his fame and the beginning of the end. Doyle won and lost a fortune and died in 1978.