After a stirring opening on the eve of the coup d'état, involving an idealistic young village couple joining up with the republican militia in the middle of the night, Zola then spends the next few chapters going back in time to pre-Revolutionary Provence, and proceeds to lay the foundations for the entire Rougon-Macquart cycle, committing himself to what would become the next twenty-two years of his life's work.

We see Pierre Rougon (the legitimate son) in his attempts to disinherit his Macquart half-siblings, his marriage to Felicité Puech, the voraciously ambitious daughter of a local merchant, and their continued failure to establish the fortune, fame and renown they seek, despite their greed and relatively comfortable lifestyles.

Approaching old age, the Rougon couple finally admit defeat and settle, crushed, into their lower middle class destinies, until by a remarkable stroke of luck their eldest son Eugène reports from Paris that he has some news that they might find interesting.

The narrative then switches over to the Macquart side of the family, whose grim working-class struggles to survive are juxtaposed keenly with the Rougons' seemingly trivial quest for greater wealth and influence in genteel drawing-room society.

[1] The novel was adapted into a 1980 French TV miniseries, La fortune des Rougon, directed by Yves-André Hubert and starring Madeleine Robinson as Adelaide and Christian Barbier as the adult Pierre.