Jeremy is the son-in-law of Bernard and June Tremaine, whose union and estrangement began almost simultaneously. Seeking to comprehend how their deep love could be defeated by ideological differences Bernard and June cannot reconcile, Jeremy undertakes writing June's memoirs, only to be led back again and again to one terrifying encouner forty years earlier—a moment that, for June, was as devastating and irreversible in its consequences as the changes sweeping Europe in Jeremy's own time.

In a finely crafted, compelling examination of evil and grace, Ian McEwan weaves the sinister reality of civiliation's darkest moods—its black dogs—with the tensions that both create love and destroy it.