Our hero Carlos Maia, heir to one of the greatest fortunes in Portugal, is rich, handsome, generous and intelligent: he means to do something for his country, something useful, something that will make his beloved grandfather proud. However, Carlos is also a bit of a dilettante. He drifts along, becoming a doctor and pottering about in his laboratory, but spends more and more time riding his splendid horses or visiting the theater, having affairs...