Luísa has been married to Jorge for three years. He is about to leave on a mission to the Alentejo when she finds out about the arrival of his cousin Basilio after a long stay in Brazil, where he seems to have made a fortune.

The amorous sacrifices of the daughter of Tomé da Póvoa, Berta, with the gentleman Jorge and, in parallel, the warm connection of the other son of Dom Luis, Maurício, with dedicated cousin Gabriela.

Between the elegant areas of Cascais and Lisbon, dangerous delinquent Barbanegra acts under the identity of the insinuating Marquis de Serpa.