Love and treason, mistakes and ideals: In 1971 Helmuth Busch attempts to flee from his past as a Stasi (secret service of former East Germany) spy. He wants to go underground in Mexico, but the Mexican secret service recognizes and blackmails him. To avoid extradition to East Germany, Helmuth agrees to observe a group of political students. As Bruno Müller, he becomes professor of history at the University of Mexico City. Bruno performs his unpleasant mission, his only wish: to survive, to come through. However, the situation gets complicated when Bruno gets more and more involved in the group of young activists and falls in love with a student, Adela. This passionate love hurls Bruno into a deep conflict. Francisca (which is not the name of a woman but of a pistol) is a love story whose main figures were also among those who shaped the history of the 1970s in Mexico; at a time when the ideals of justice and social change influenced a whole generation. It is an unusual and gripping look at the student movement and at Mexico.