Luís Cláudio is a professional boxer, champion of some tournaments, with dozens of career wins. Acelino "Popó", his younger brother, wants to follow the same path. While Luís Cláudio dedicates his time exclusively in the ring, Popó divides his day between training and work in a dedetizante, which he faces grudgingly. When the elder is invited to compete in a tournament in the United States, Popó sees an opportunity for himself.

In Miami, USA, the Freitas brothers win one fight after another in the tournament. But they soon realize that the world of boxing is not for amateurs. A backstage maneuver will bring a bitter taste to your victories.

Dantas struggles to get new fights for both brothers, while Luis Claudio and Popó face challenges in various places. And when things seem to be getting right, new obstacles come up.

Popó's style catches the eye of Julio, his manager, who decides to invest only in his career. But that decision will leave him unfocused for training, especially when he finds out he's going to be a father.

Now separated, the Freitas brothers follow opposite paths. As Popó begins his climb to the world title, Luis sees his life sink as he discovers a serious illness that could end his career.

Luis Claudio ignores the medical advice. Concerned, his wife Sandra goes after Popó to ask for financial help for the medication, but this will further alienate the brothers; in Liverpool, Popó is one step away from the world title.

Back in Brazil, Popó meets his newborn son and reunites with his family; the brothers' relationship strengthens when an opportunity arises for Luis Claudio to compete for a belt in Mexico.

The time has come for Luis Claudio to decide: boxing or life. Deco, childhood friend of the Freitas brothers, loses his mind when he sees his grandmother without the medicines. In France, Popó faces the fight against the balance before facing his opponent for the world title.