Hands of Stone

Growing up in Panama, Durán is homeschooled by Chaflan, who teaches young Roberto some vital life lessons. Later, Duran joins a boxing club with Nestor “Plomo” Quiñones as his coach. As he reaches 20, an American legendary boxing trainer Ray Arcel, who nearly lost his life after being attacked by an assailant sent by the mobster, Frankie Carbo in 1953 in New York City and is now living with his wife Stephanie, notices Roberto's raw talent and punching power and takes the young fighter under his wing, becoming his coach. Not long after, Durán meets Felicidad, a student, with whom he later has five children. After his fights through the 70s and 80s, rising through the divisions with phenomenal success (just one loss) he challenges Sugar Ray Leonard, dubbed as the “Fighter of the Year.” However, Durán is disrespectful to Leonard, describing him as a “clown” and confidently predicts a knockout win for himself.

One night, Durán insults Leonard in front of his wife by calling him a “homosexual”. The incident angers Leonard. Durán's hard feelings for Leonard seem to stem from his resentment of Americans in general, because he recalls the ill-treatment meted out by the Americans to the nation of Panama, remembering how American troops took over the country by owning the Panama Canal—leading to conflict between the sides in 1964.

In June 1980 in Montreal, the day of the fight between Durán and Leonard, Durán wins the welterweight championship via unanimous decision (148–147, 145–144, 146–144). After the fight, Leonard states that being insulted is a strategy and calls for a rematch with an $8 million purse. At the house party, Durán is made aware of Leonard's challenge by his manager Carlos Eleta, but he was intoxicated and reluctantly agrees to the rematch. Duran, while drunk curses at Chaflan for jumping into the pool, splashing water over him and kicks Chaflan out. Now living on the streets, Chaflan resorts to stealing food to survive. He is killed after being struck by a truck one night while running away after he stole food.

In November 1980, Durán and Leonard face in the ring for the second time, this time the venue is in New Orleans. But in the eighth round, Durán gives up by saying “No más” (English: “No more”) to the referee, angering the entire Panamanian community, thus Leonard wins via technical knockout (68–66, 68–66, and 67–66).

Upon returning home to Panama, he faces angry protests. Durán tells his wife that he regrets letting them down and needs to go back in the ring in order to regain his popularity and the forgiveness of his fans. Due to this incident, Arcel is retired from his training and tells Durán that Plomo will be his coach. In June 1983, New York City, the day of his fight against Davey Moore, Leonard gratefully meets Durán for the first time since the rematch, saying that he forgives Durán. He tells Leonard that he gives his apology to his wife. As the fight with Moore goes up to the eighth round, in which Leonard is the commentator, Durán wins the fight via technical knockout and eventually restores his popularity and dignity with the people of Panama.

In the film's epilogue, it states that Plomo was at Durán's side for every fight until Plomo's death in 2012; Leonard and Durán remained friends; Ray Arcel was the first boxing trainer to be inducted into both the World Boxing Hall of Fame (WBHF) and the International Boxing Hall of Fame (IBHF). He died on March 7, 1994, at the age of 94 after a six-year battle with leukemia.