World peace is at stake if a spy-ring obtains the electronic device

The sea, often treacherous, is the only source of living of the people of Nazaré. The film tells the story of António and his family, where no dreams are allowed. There is also the mourning of the woman in black wailing silently on the beach or waiting for their children lost in the sea.

The tragedy of a woman who - after seven years of vain searches - gave up hope of finding her husband, a knight lost in battle in Marroc with Sebastião, king of Portugal. She marries, has a daughter by her second husband, and endures the silent reproach of an aid, Telmo Pais, the only who kept his hope that his master shall return, as well as the king... One day, a mysterious pilgrim arrives at the mansion.