David, married with a daughter, is about to leave Portugal with his family, but first has to stop by his home village for his grandfather's burial. There he meets his cousin's wife Ana, who intrigues him.
Set four years after the Portuguese revolution and the simultaneous loss of the Portuguese empire in Africa, the story concerns a director who sells guns to finance his play.
Zéfiro is a film about Lisbon, the last of the Mediterranean cities, condemned to the Atlantic by the vast estuary that separates it from the "other band".