Women's boxing in Mexico was illegal, until Laura Serrano, a passionate lawyer, began to practice it clandestinely. A series of events jeopardize her passion, leading her to launch a battle to legalize the sport in Mexico and achieve gender equality in boxing.

Young Gloria is abused by the Vitorina, hospice caretaker hosting it. She forces her to perform the heaviest tasks. Gloria is only happy in music class. When she grows decides to escape, and now she lives on the street with another girl, both singing in the trucks and try to survive.