At New Mexico's Empire Zinc mine, Mexican-American workers protest the unsafe work conditions and unequal wages compared to their Anglo counterparts. Ramon Quintero helps organize the strike, but he is shown to be a hypocrite by treating his pregnant wife, Esperanza, with a similar unfairness. When an injunction stops the men from protesting, however, the gender roles are reversed, and women find themselves on the picket lines while the men stay at home.

• Intl Union of Mine, Mill & Smelter Workers
• Independent Production Company (IPC)
• Rosaura Revueltas
• Juan Chacón
• Will Geer
• David Bauer
• Mervin Williams
• David Sarvis
• Clinton Jencks
• Virginia Jencks