Marked by his scarred face and broken nose, Tom becomes a fugitive, hidden by his family. The Joads flee the peach ranch at the first daylight. They find work picking cotton and share an empty boxcar with another family, the Wainwrights. Tom hides in a nearby cave where his mother leaves him food. The family is comfortable for a time, earning enough to eat meat daily. One day, however, young Ruthie gets in a fight with another child. She threatens to call her big brother who is hiding because he has killed two men. Ma rushes to tell Tom he must leave for his own safety. Tom agrees and leaves with plans to carry on the social work that Jim Casy has begun.
Al gets engaged to sixteen-year-old Agnes Wainwright. As the cotton picking slows, the rains come. It rains steadily, and the water levels begin to rise. The night that Rose of Sharon goes into labor, the river threatens to flood the boxcar. Pa, Uncle John, Al and the rest of the men try to build an embankment to contain the river, but are unsuccessful. Rose of Sharon's baby is stillborn.
After a few days, the rain subsides. Leaving Al and the Wainwrights, the remaining Joads abandon the boxcar for higher ground. They find shelter in an old barn already occupied by a boy and his starving father. The child tells the Joads that his father has not eaten in six days and is unable to keep down solid food. Rose of Sharon offers him the breast milk no longer needed for her own child. The others leave the barn as she cradles the dying man to her breast.
