Perdido, Alabama, has scarcely recovered from the floods that devasted the community. Now a scheme to build a levee is dogged by a series of mysterious events: unpredictable currents in the river, worrying disappearances.

Meanwhile in the Caskey family, Marie-Love, the matriarch, continues her machinations against Elinor, her strange daughter in law. Plots, unholy alliances, sacrifices - in the struggle between them, nothing is off limits. In Perdido, the changes will be profound; the consequences irreversible.