An unnamed father and his young son journey across a grim post-apocalyptic landscape, some years after an unspecified apocalypse has destroyed civilization and most life on Earth. The land is filled with ash and devoid of living animals and vegetation. Many of the remaining human survivors have resorted to cannibalism, scavenging the detritus of city and country alike for flesh. The boy's mother, pregnant with him at the time of the disaster, gave up hope and committed suicide some time before the story began, despite the father's pleas. Much of the book is written in the third person, with references to "the father" and "the son" or to "the man" and "the boy."