When Mr. Elias discovers that his aunt, who lives in Brazil, comes to visit him, he decides to temporarily occupy the house of a wealthy neighbor who's away so that she doesn't discover that he's not as rich as he told her.

Luís immigrated to the USA and intends to become an American. But after his father invites him on a journey to the Portuguese territories in Africa, he will find true love, and also learn to value his country and its colonial grandeur.

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.

In Madragoa, Zé Luís, a man of the people devoted to his work, is in love with Clara, the daughter of Santana das Carnes, his godfather and protector, who intends to marry her to D. Eusébio with the intention of financing his business. When Santana discovers the romance, he fires Zé Luís and forces him to break it off, convincing him that he owes his marriage to Margarida, a young woman of the same upbringing. Zé Luís finds employment at the docks, Margarida dies of illness, Santana goes bankrupt... Zé Luís supports him with initiative and money from his father, who has meanwhile returned from Africa, and ends up marrying Clara.