Tom Joad hitchhikes home in a truck after being released from prison, revealing he served time for killing a man.

Tom and Casy arrive at the Joad family farm to find it abandoned, caved in, and overgrown with cotton.

Tom reunites with his mother at Uncle John's house and learns the family is preparing to drive to California.

The family drugs Grampa with camphorated opium in his coffee when he refuses to leave for California.

The Joads meet the Wilsons on the highway; Grampa, sick and feverish, dies of a stroke in the Wilsons' tent.

The Joad family buries Grampa by the road themselves to avoid paying a forty-dollar undertaker's fee.

A ragged man at a highway camp tells the Joads he is returning from California, where his family starved to death.

The Joads cross the California desert overnight, and Ma reveals in the morning that Granma died during the journey.

Floyd explains police repression at a migrant camp, and a deputy tries to arrest him for challenging a labor contractor.

Casy steps forward and takes the blame for the altercation with the deputy, allowing Tom to escape arrest.

The Joads arrive at a clean government-run migrant camp with running water and protection from police harassment.

The Joad family is forced to leave the government camp after a month without finding enough work nearby.

Tom slips out of the peach ranch at night and finds Casy leading a strike over wages cut in half.

A police officer strikes Casy dead with a pick handle; Tom kills the officer in retaliation before fleeing.

Rose of Sharon lets a starving man in a barn drink milk from her breast, saving him from death.

Pool 1 follows the headline events of the Joad family's migration from Oklahoma to California after being evicted from their farm. Beginning with Tom Joad's release from prison, the pool traces the family's journey west on Highway 66, marked by the death of Grampa on the road and the revelation that Granma died crossing the California desert. Arriving in California, the Joads face police repression, a brief sanctuary in a government camp, and brutal exploitation on a peach ranch. The heroic sacrifice of preacher Casy, killed while organizing a strike, drives Tom to kill a police officer and flee the family forever. The pool closes with the novel's famous final act, in which Rose of Sharon nurses a starving stranger in a barn, embodying the migrants' ultimate solidarity.

The Joads' desperate journey from Oklahoma to California and their fight to survive.

Tom meets ex-preacher Jim Casy resting under a willow tree; Casy explains why he abandoned religion for a belief in human unity.

Muley Graves finds Tom at the abandoned farm and explains that the whole community was evicted and the Joads moved to Uncle John's.

Tom, Casy, and Muley hide in dark fields to avoid a sheriff's spotlight after their campfire is spotted.

The Joad family holds a council around the truck and agrees to let Casy join them on the journey to California.

When Tom proposes splitting the group to fix the car, Ma grabs an iron bar and forces everyone to stay together.

Noah quietly tells Tom he does not feel loved by their parents and walks away alone to stay at the river.

A policeman finds Ma alone at the riverside camp and orders the Joads to leave by morning or face arrest.

The Wilsons remain behind at the California border camp because Sairy Wilson is too sick to continue traveling.

A small farmer named Thomas warns Tom that the Farmers Association is forcing him to cut wages to twenty-five cents per hour.

A religious woman named Mrs. Sandry warns Rose of Sharon that dancing at the government camp will cause her to miscarry.

Tom and other men identify three planted troublemakers and escort them out before they can start a riot at the Saturday dance.

The Joads pick peaches all day for only one dollar while the guarded ranch store charges inflated prices for basic food.

Ruthie brags during a fight with another child that her brother has killed two men and is hiding nearby in the woods.

Torrential rain floods the Joad family's boxcar home and destroys most of what little they have left.

Pa and the men dig a protective ditch around the boxcar, but a tree brought down by the storm breaks through it.

Pool 2 covers the significant secondary events that give depth and emotional substance to the Joads' experience. It begins with Tom's reunion with Casy on the road home and the community preparations to leave Oklahoma, including the family council and Ma's fierce act of keeping the group together with an iron bar. Along the road and into California, the pool highlights quiet personal losses like Noah's departure, the family's harassment by authorities, and the temporary dignity they find at the government camp dance. The pool then follows the exploitation at the peach ranch, the catastrophic rains that flood their boxcar home, and the desperate effort to hold back the floodwaters with a makeshift ditch. These events reveal the loyalty, grief, and stubborn endurance running beneath the novel's larger political story.

The key secondary moments that reveal the human texture of the Joads' story.

Tom confesses to Casy that he stabbed a man who attacked him at a dance, which sent him to prison for four years.

Casy gives an unconventional grace at the Joad family dinner, declaring that the holiness of human community matters more than God.

Ma warns Tom that the leaflets promising California wages seem too good to be true, and Tom shares what a fellow prisoner told him.

Ma burns a box of old family photographs and newspaper clippings alone beside the fire the night before the family leaves.

The Joads' dog runs into the highway and is struck and killed by a passing car shortly after the family sets out.

The Joads and Wilsons agree to share vehicles and travel together to California after Al offers to fix the Wilson's broken car.

A father and son traveling east from California warn the Joads that migrants are despised and wages are almost nothing there.

The Joads see California's green and fertile valley for the first time after surviving the overnight desert crossing.

Connie abandons Rose of Sharon and their unborn child and disappears from the family's roadside migrant camp in California.

An armed local militia stops the Joads on the highway to intimidate migrants heading north; Tom must be physically restrained.

The Joads escape the peach ranch under cover of darkness after Tom kills the officer who beat Casy to death.

The Joads find cotton-picking work and move into a boxcar while a wounded Tom hides in the nearby woods.

Ma finds Tom hiding in the woods and gives him seven dollars; Tom tells her he will spend his life fighting for migrants.

Tom says a final goodbye to his family and slips away into the darkness after his hiding place is accidentally revealed.

Rose of Sharon delivers a stillborn baby, and Uncle John floats the tiny body downstream in a box as a silent protest.

Pool 3 focuses on the confessions, moral revelations, and decisive turning points that quietly reshape the characters throughout the novel. It begins with Tom's admission of his crime to Casy and Casy's radical humanist grace at the family's farewell dinner, establishing the philosophical heart of the story before the journey even begins. Key warnings from returning migrants prepare readers for the brutal reality of California, which the Joads encounter through events like Connie's abandonment of Rose of Sharon and the armed militia's roadside intimidation. The pool then captures Tom's profound transformation from a man trying to stay out of trouble into a committed activist, culminating in his farewell conversation with Ma before he permanently disappears into the night. It closes with the heartbreaking birth of a stillborn baby and Uncle John's defiant act of sending the body downstream as a silent protest against the world's indifference.

The pivotal discoveries and decisions that transform the Joads' understanding of themselves and their world.