The old, sickly Demeter Lapussa is a tyrant in the family. He forces his granddaughter, the beautiful Henriette, to marry baron Hátszegi, although the girl loves the penniless Vámhidy Szilárd. The two lovers attempt to commit suicide, then are torn away from each other.

Faithful to his word, Michael Tímar, captain of the St. Barbara, becomes the guardian of Kondya, daughter of a Turkish aristocrat on the run. Later, he weds the grateful young Turkish girl whom he saved from the waters of the Danube. While skillfully managing his wife's fortune, entrepreneur Tímar becomes an important wholesaler of wheat and exports his products to Brazil. But his marriage of convenience proves a failure. He is torn between the demands of bourgeois civilization, governed by money, and the ideal of freedom, consisting of living simply within nature. He then takes refuge by the side of the sweet Noemi on an island on the Danube.