Worth, a western banker, and a civil engineer called The Seer come upon a dead woman and a live baby when crossing the desert. Unable to have a child of his own, Worth adopts Barbara when all attempts to identify her have failed.
The Seer envisions taming the river and channeling it through the desert to turn it into arable farm land. It’s his life’s goal. Greenfield, an eastern financier, also envisions that, but whereas The Seer’s plan is altruistic, Greenfield’s is profit motivated. After making his initial report on the feasibility of the project, The Seer is fired and replaced with Greenfield’s nephew and almost son Willard.
Willard, a New England boy out west for the first time, initially is no different from his uncle in terms of what his goal is, but after falling in love with Barbara, he’s come to appreciate the desert and the ranchers come to settle it as Barbara does.
The company’s new water works were built as cheaply as possible to not cut a penny more than necessary into the profits. Worth and Willard both know that the situation is dangerous. An unusually high flood from the spring thaw in the mountains could destroy it and all the work that’s gone into the town.
With his own fortune, Worth sets about building a parallel town to the company’s—one built to last. Greenfield, meanwhile, tries every underhanded trick to force him into bankruptcy. It causes a falling out between him and Willard, leading to Willard being disowned.
And the flood does come. The company’s new town is washed away in a matter of hours and the farm land submerged beneath a vast inland sea. Greenfield had almost succeeded at ruining Worth but Willard thwarts him at the last minute. Barbara, who it turns out is really Greenfield’s niece, accepts Willard’s marriage proposal.
Inscription: Tucked into the last page is a 1940 newspaper clipping about Texas growing half of the world’s supply of roses.