In the gritty border town of Nogales, Mexico, Brian, a hardened loner living in a makeshift camper, is haunted by nightmares of his wife being attacked. To escape these visions, he throws himself into martial arts, relentlessly training day after day.

Oscar, a young man from the same neighborhood, is fascinated by Brian's training sessions. Longing to learn how to fight, Oscar watches Brian's training in his daily ritual before heading to school.