Ramón Alvia is a professional boxer who is at the end of his career. His wife and kids want him to quit and start a new activity or job. He refuses to accept this because he feels he is still young and able to continue with his career. At the gym he discovers a young beautiful girl, a boxer called Deborah. Seduced by her wild strength, Ramon feels he has regained his vigor. He abandons his family and faces his manager, indulging a passionate relationship in which pleasure and pain are closely linked and violence increases on each round.