Este curta-metragem, provavelmente uma encomenda da Hidroelétrica do Cávado, mostra vários aspectos da construção da rede de barragens daquela bacia hidrográfica, com um comentário lido pelo jornalista Fernando Pessa.
The film exhibited the community and the beach, "how I new and it was shown to me" (Manoel de Oliveira) by the Meneres family, that had a house in Miramar. The film is currently lost.
Reflecting the filmmaker's passion for automobiles, who in his youth participated in car races, the film portrays the attempt to manufacture a new model in the Ford factory in the city of Porto.
