In twenty-second century America, war, disease and pollution have wiped out three-quarters of Earth's population and left most women sterile. Scientists are battling the specter of human extinction. Now they've devised a DNA test and built a database to help each of the remaining fertile females find her perfect genetic counterpart, thereby ensuring healthy, hardy offspring.

For Midwestern farm girl Hannah Jenkins, this means accepting a stranger as a potential mate. Unfortunately, the handsome Dr. David Cabot isn't everything she'd expected. Distant and humorless, he spends all his time in the makeshift laboratory he's set up in the family barn. He and Hannah use more energy sniping at each other than communicating their wants and needs. After a few months of passionless monthly encounters with no pregnancy to show for it, Hannah is certain David will abandon her at the end of their trial marriage.

Then a stranger saves Hannah from robbery at gunpoint, and Hannah hires him to work as a farmhand. The mysterious Trey intrigues both Hannah and David, but can he show them how to make love without making war?