[IFFR'22] Second documentary of the series of seven films "La saga de los mártires unitarios", returns to the review of History through the music that represents it. The dynamic of collaboration between Mariano Llinás and Agustín Mendilaharzu works well in their analysis of the lyrics of the songs that speak of the "Rosas era". But sometimes it is repetitive and its historical assessments are too local, although true pleasure is always achieved when the milongas take over the film.