At 19, Deni Prieto Stock joined a guerrilla group and, four months later, on February 14, 1974, was killed by the Mexican army in the state of Nepantla along with four of her companions. A series of testimonials shows us the family and social circumstances that influenced Deni’s path. We also see the ties of love and friendship that she found along the way, as well as her daily life underground and the discipline and aspirations she shared with her fellow guerrillas.