Bryan lives in a small town in Mexico and he is about to turn eleven. Before he was born, his dad left to the United States with the promise of a better life for the family, but he never came back. Betty, his mother, works in the city as a housemaid to support Bryan’s studies, and she only gets to see him on weekends.

Bryan’s family, The Cortez, is a fourth-generation breeder of fighting bulls. Just like them, Bryan is determined to follow this long-standing tradition that is about to disappear. Bryan’s mother wants him to keep studying and leave life at the ranch, but Bryan has a hard time understanding what the world has to offer beyond the fences of the animals’ pen.

Becoming is a coming-of-age story about a boy who is trying to become a man in a male-dominated society and without a paternal figure to guide him along the way. At the end of this school year, Bryan must choose between working in the countryside or continue studying, while waiting for a father that will probably never return.