 Those enlisted included young, left-wing, politically active students from the organization named the "Unión de Estudiantes Secundarios" (Union of High School Students) of La Plata.The UES was committed to achieving school reforms and other political reforms, through demonstrations and protests that irked the ruling regime.Many of these kidnapped students were killed and their whereabouts are unknown, very few were able to survive this experience, one of these was released at the end of the film.