In this sports drama, a tough and ambitious woman follows her dream to succeed in a field where few women have dared to go. Isabelle Alvarado (Sophia Adella Hernandez) grew up in a tough neighborhood in East Los Angeles, where her father once had a promising career as a professional boxer. He set sports aside and took a job as a policeman, and her mother when Isabelle was still a child. Now that Isabelle has grown to adulthood, she wishes to follow in her father's footsteps and become a female boxer. She discovers, however, that in a sport dogged by corruption and dominated by men, the climb to the top is steep and slippery. Knockout also features Paul Winfield, William McNamara, and Tony Plana.