Colombia 1920's. The country receives compensation for the separation of Panama and is open to foreign credit to undertake major development works. Growing mass of workers but not improve their conditions as still subject to the place since colonial times. The climate is more conducive to that industrial strife and the emergence of leaders who are: Maria Cano was one of the Highlights. His work on behalf of the workers were also given for the woman confronted the powerful toured the country and raided the literature. She and her colleagues do this story.