 Jobless sportswriter Eddie Willis is hired by corrupt fight promoter Nick Benko to promote his current protege, an unknown Argentinian named Toro Moreno. Although Moreno is a hulking giant, he possesses a powder-puff punch and a glass jaw. Benko relies on Willis  reputation and standing in the boxing community and a series of fixed fights to get the unsophisticated Moreno to the championship fight. The reigning champ, the sadistic Buddy Brannen, harbors resentment at the publicity Toro has been getting, and vows to viciously punish him in the ring. Eddie must now decide whether or not to tell naive Toro the truth.