The movie is a recreation of the first part of Argentina's classic national book, the gaucho poem Martín Fierro, written by José Hernández in 1872.
It tells the story of a gaucho named Martín Fierro, who is forcefully taken by the government to join the militias and fight against the indigenous people on the frontier.
After a long time, Fierro returns to his homeland, but he has lost his family and his ranch.
However, Fierro doesn't give up and fights back at every opportunity.
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