Life on planet Earth has been wiped out by biological warfare, leaving behind only androids. Two of those androids, Martin and Alicia, have a secret project: Cain, a human being grown from the DNA of a single human hair. Martin and Alicia must keep Cain's existence hidden from the military androids, led by Moloch, a power-mad machine who is determined to stamp out any trace of the human race before it rises again.

Dr. Christina Markham and Sheriff Grady Markham live in small town America. Alzheimer's disease is slowly robbing Christina of her mother Helen, who lives in a nursing home along with her long time friend Gerry. When three apparently healthy young women age and die within hours, the Markhams are baffled and frightened. Grady interviews stunned witnesses and Christina seeks medical explanations, hoping to prevent another tragedy. Only after Helen and Gerry vanish is the astonishing answer to the puzzle finally revealed.