Fundación Banco Santander and the universities of Exeter and Barcelona created this audiovisual library back in 2019 which presents the testimony of outstanding women in the socio-cultural life of 20^th century Spain and Latin America. It consists of short film capsules directed by the filmmaker Paula Ortiz and Professor Nuria Capdevila-Argüelles, in the production of which students from the University of Exeter also took part.

In 2021 the letters were dedicated to the poet, teacher and member of the Real Academia Española, Carmen Conde; the writer and politician, Federica Montseny; and the poet and journalist, Eunice Odio, who were interpreted by the actresses Nadia Serantes, Estrella Alonso and Jimena Larraguivel, respectively.  

The film was premiered on 4 October at the Edinburgh Spanish Film Festival and was presented to the Spanish press on 26 November.