In a violent near-future, Asa Elias Doyle and her companions encounter
an alien life form so heinous and destructive, they exile themselves in
the desert so as not to contaminate other humans. To resist the
compulsion to infect others is mental agony, but to succumb is to
relinquish humanity and free will. Desperate, they kidnap a doctor and
his two daughters as they cross the wasteland--and endanger the world.