The aliens left the entire human race infertile so that we would vanish by attrition. Carrie Player is tasked with the responsibility of finding a cure in the vast cache of alien data stored on the reading device that the alien, Deshler, gave her as a parting gift. While the species is dwindling terrorists are trying to hasten the end by unleashing a deadly epidemic on America. To battle the new threat the CIA puts a different woman on the case, a very different woman.