1976: Despite his career being on the ropes, Oscar “Ringo” Bonavena arrives in Reno, Nevada, seeking a rematch against Muhammad Ali. There, he meets the man who bought his contract, Joe Conforte. In 1963, a young Ringo is suspended in a controversial fight in the Pan American Games.

In 1965, after his father passes away, Ringo returns to Argentina and sets out to pursue the local heavyweight title. After his debut in Buenos Aires, he meets Tito Lectoure. In Reno, unfortunate news about Ringo’s visa leads him to consider a proposal. Later, a fight doesn’t go as planned.

After becoming Argentina's heavyweight champion, Ringo distances himself from his inner circle, including Dora, and relishes the limelight. In Reno, Ringo must leave the Mustang Ranch after an argument with Joe Conforte. Sally, however, has something else in mind.

1967: Ringo travels to Germany for a heavyweight title eliminator, fighting for the belt that was left vacant by Ali refusing to go to Vietnam. In Reno, Ringo grows closer to Tracy and Suárez and eyes a business opportunity at the Mustang Ranch.

1968: Ringo is defeated by Jimmy Ellis in the heavyweight title eliminator. Later, he faces Joe Frazier in a brutal bout in Philadelphia. Ringo and Sally’s intimacy grows in Lake Tahoe.

Joe Conforte threatens Suárez and Ringo after they return from Lake Tahoe. In Buenos Aires, a mysterious promoter alters the course of Ringo’s career.

New York, 1970: Ringo gets his shot against Muhammad Ali in the biggest fight of his career. In Reno, Ringo’s life comes to a tragic end at the Mustang Ranch.