Kate has an idyllic life on a remote farm with her four daughters. She's in love with her neighbor, Lucy. And she has never known a world with men.

All the men are gone. Their decline occurred over the course of generations, fewer boys born every year, until eventually, none were born at all. After the Waning Wars, the Governing Council promised there was a plan and seed stores to last.

But when an imprisoned old woman writes a deathbed revelation declaring she was mother of the last son, and he'd been stolen fifty years ago, it creates unrest in a civilization where men had become little more than myths.

Rumors of men—the last men—being held in secret, stirs a ragtag group of women to find them, bringing the battle for womankind's future straight to Kate's doorstep.