The film describes the living situation of the working class in the United States in the 1940s, working conditions, oppression by capitalists, workers' just struggle for their rightful rights and job security, as well as the relationship between workers and families. Ramon Quintillo, a miner from Dreyville Zinc, has been underground for 18 years in a mining town in New Mexico in the 1940s. The new regulations made by the company are unreasonable and the workers have to risk their lives to go down to work. Another casualty accident occurred. After the reasonable demands made by the workers were rejected by the company, under the leadership of Ramon, the workers went on strike. In support of the strike, Ramon's wife, Esperanza, organized the women into a strong support team for the strikers. Ramon was arrested by the police bribed by his boss and released a month later. Then the boss bribed the court to accuse the workers of violating the Taft-Hartley law, and the women led by Esperanza stepped forward to take over the pickets of striking workers, because the Taft-Hartley law did not apply to them. Esperanza and a group of women were released after being locked up for a few days, and the helpless boss did both soft and hard: mobilizing striking workers to go hunting and sending police.