Rosa Maria, whose father is a sailor, was picked up by Tomé, having a child of her son Renato, who is expelled from home.

Jorge, a successful engineer and employee of a ministry and Luísa, a romantic and dreamy girl, star as the typical bourgeois couple of the Lisbon society of the 19th century.

Caleidoscope of documentary-like scenes and re-enacted episodes of a day in the life of a large port town – Lisbon, from the old district around Saint George's Castle down to the docks and the 'Sagres' on the Tagus river, to the new commercial districts.