In the early twentieth century, thousands of homesteaders and "suitcase farmers" converge on the southern Plains, where wet years, rising wheat prices and World War I produce a classic boom. Millions of acres of virgin sod are plowed up. Caroline Henderson stakes her claim in a strip of Oklahoma called No Man's Land, and for a while prosperity seems certain for her and the families of two dozen survivors who provide eyewitness testimony. Then, in 1931, a decade-long drought begins, exacerbated by the Great Depression. Huge dust storms carry off the exposed topsoil and darken the skies at midday, killing crops and livestock. "Dust pneumonia" breaks out, threatening children's lives. And just when it seems things could not get any worse, in 1935 the most catastrophic dust storm in history strikes on "Black Sunday."