In the Dust Bowl of 1930s Oklahoma, a family comes apart, as sisters Mackie and Etta Spoon keep secrets from their father, and from each other.Etta, the dangerously impulsive favourite of her father, longs for adventure someplace far away from the bleak and near-barren plains, and she doesn't care how she gets there; watchful Mackie keeps house and obeys the letter of her father's law, while harbouring her own dreams. After the massive 1935 Black Sunday dust storm brings ruin to the family, the sisters' conflict threatens further damage. Seeking escape, and wagering their futures on an Indian boarding school runaway named Audie Kipp, the two leave home to forge their own separate paths, each setting off in search of a new life, each finding a fate different than she expected.Through shifting perspectives, voices, and characters, "What the Thunder Said" tracks their wayward progress, following the sisters, their children, and those whose stories intersect with theirs as they range across the high plains of the West in the decades after the Great Depression. Etta's hitchhiking encounter with a bookish couple in the Garden of the Gods; a prairie jackrabbit drive, during which Mackie's son, Jesse, discovers the cloth he's cut from; an old man's failing memory as he tells of spying on an Indian loner on the outskirts of a Kansas town; a middle-aged doctor's chance meeting with a mysterious wayfarer while on a quest to New Mexico in search of his lost youth; and Mackie's late reconciliation with her aged father, whose habit of silence has bred her own - all are rendered in vivid prose that captures the plains and the people who endured devastation and lived to look back on it.