These walls / Estos muros

It is an investigative documentary, which arises from the chance discovery of a poem written on the ruins of a building near a train track during filmmaker Alberto Pascual’s childhood. From this lonely moorland in the Sierra de Madrid, we discover one of the darkest episodes in Spain’s history, namely Penalty Redemption through Labour, a legal device that allowed, during the Franco regime, public and private companies to use republican prisoners as forced labour.