An Unknown Enemy

The students establish the National Strike Council (CNH), and organize one of the largest marches ever seen in the country. The government of president Diaz Ordaz is placed in the spotlight. At the same time, the CIA wants to help Corona del Rosal, a candidate to the presidential race, to carry out a coup and return the country to law and order.

Barrientos infiltrates guns among the students, to make them seem like a more threatening force to president Diaz Ordaz. Elsewhere, the CIA tries to influence the military leaders of the country to move forward with a coup and they reject their plans. Alicia, finally discovers who the government infiltrator.

President Ordaz arranges a meeting with the students through the Chief of the Presidential Office. The meeting appears to be a success, but Barrientos wants to discredit the gains attained during the meeting by creating a sense of "chaos" in the country. Beto tries to take Alicia out of the city, knowing her life is in danger, he soon realizes that Barrientos' eyes are everywhere.

Corona del Rosal convinces the president to use moles during the "March of Silence," a march organized by the National Strike Council, in order to put an end to the organization. Barrientos wants to thwart his plans by provoking a fight during the march. However, seeing how well prepared the students were, Barrientos has to put a stop to his plans and re-evaluate his methods.

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