Watch MoviestoWatch. In Los Angeles, undocumented Mexican immigrant Maya finds work as a janitor through her sister, Rosa. However, as both work non-union, conditions are grim. After enduring abuse from her superiors, Maya is open to the pro-union rhetoric offered by organiser Sam Shapiro. Rosa, meanwhile, is far less interested in clashing with management, given the needs of her family, and a rift forms between the sisters.