The regent of Mexico City, Corona del Rosal, wants to weaken his main adversary in the presidential succession by getting rid of the National Security Directorate. Major Barrientos, the leader of the DNS, tries to strengthen its position and that of his boss by creating the perception that the student movement striking in Mexico City is a real threat, to then repress them violently.

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.