The man wakes in the dark, grips his son, and surveys the ashen landscape. They pack their cart and begin moving south. The world is dead. A dream of the man's wife haunts him, but he turns from it. The novel establishes its universe: no names, no dates, no explanation of how the world ended.

Through flashbacks and the man's interior monologue, we learn the wife's decision. When the catastrophe struck, she saw clearly what survival would mean and chose to die on her own terms. The man could not follow her because of the boy. He understands her logic. He cannot forgive it.

The man and boy discover an apparently abandoned house and descend into a locked cellar. They find dozens of people being kept alive as livestock by a cannibal gang. They barely escape. The scene redefines what survival means and what evil looks like when necessity strips it bare.

Across many small encounters — a starving stranger on the road, a boy glimpsed and lost, a man struck by lightning — the boy presses his father to help people. The man refuses or hesitates. The boy's insistence on goodness becomes the novel's moral engine. Who is teaching whom?

The man and boy discover an underground shelter stocked with canned food, tools, and supplies. For days they rest, eat, recover. The boy plays. The man sleeps without fear. It is the closest thing to safety they have known, and leaving it is the novel's most painful practical decision.

They reach the sea. It is cold and grey and offers no salvation. A thief steals their cart. The man, in a terrifying deviation, pursues him and takes everything back, including the man's clothes, leaving him naked in the road. The boy is horrified. They fight. The episode tests the novel's moral framework and the man fails it.

The man's lungs fail progressively. He coughs blood. He can no longer carry the cart, then can barely walk. He continues to protect the boy with diminishing capacity. He begins preparing the boy for his own death — teaching him, testing him, letting go. This is the novel's longest and most painful sequence.

The man dies. The boy stays beside his body for three days. Strangers find him — a family, seemingly good. The boy must decide to trust them without his father's guidance. He does. The novel closes with a vision of trout in a mountain stream before the world ended: the most beautiful paragraph in the book.