The story of boxer Rocky Graziano's rise from juvenile delinquent to world champ.

Jobless sportswriter Eddie Willis is hired by corrupt fight promoter Nick Benko to promote his current protégé, an unknown Argentinian boxer named Toro Moreno. Although Moreno is a hulking giant, his chances for success are hampered by a powder-puff punch and a glass jaw. Exploiting Willis' reputation for integrity and standing in the boxing community, Benko arranges a series of fixed fights that propel the unsophisticated Moreno to #1 contender for the championship. The reigning champ, the sadistic Buddy Brannen, harbors resentment at the publicity Toro has been receiving and vows to viciously punish him in the ring. Eddie must now decide whether or not to tell the naive Toro the truth.

Gino Monetti is a ruthless Italian-American banker who is engaged in a number of criminal activities. Three of his four grown sons refuse to help their father stay out of prison after he's arrested for his questionable business practices. Three of the sons take over the business but kick their father out. Max, a lawyer, is the only son that stays loyal to his father.

Despite his talent as a musician, a city boy decides to become a boxer. He's successful as a fighter — much to the dismay of his parents. When gangsters try to by a piece of him, he begins to have second thoughts.