A mass grave in Russia that conceals the mummified remains of two women, both with child - and the conspiracy to keep it secret... a major discovery high in the Alps: the preserved bodies of a prehistoric family - the newborn infant possessing disturbing characteristics... a mysterious disease that strikes only pregnant women, resulting in miscarriage. Three disparate facts that will converge into one science-shattering truth. Molecular biologist Kaye Lang, a specialist in retroviruses, believes that ancient diseases encoded in the DNA of humans can again come to life. But her theory soon becomes chilling reality. For Christopher Dicken - a "virus hunter" at the Epidemic Intelligence Service - has pursued an elusive flu-like disease that strikes down expectant mothers and their offspring. The shocking link: something that has slept in our genes for millions of years is waking up. Now, as the outbreak of this terrifying disease threatens to become a deadly epidemic, Dicken and Lang, along with anthropologist Mitch Rafelson, must race against time to assemble the pieces of a puzzle only they are equipped to solve. An evolutionary puzzle that will determine the future of the human race... if a future exists at all.