Widowed cattle rancher Hetty Thompson had done all right for herself since Big Jim’s death. She had Barney, a loyal if dim-witted ranch hand, and Johnny her assistant manager whom she rescued from a drunken father years before. When the government carves out a huge piece of Frenchman’s Flat for an atomic testing ground Hetty and her neighbors object, but the millitary fences in the range anyway. It wasn’t so bad for a while. Then Hetty’s chickens began laying golden eggs, and her prize Guernsey produced explosive milk. Nevada ranch folk are tough but are they ready for mutant livestock? (Summary by Gregg Margarite)