Readers have long wondered what befell the Emerson clan during the years before the Great War. Now, at last, the silence is broken and the truth revealed of a perilous journey to a secret and mysterious place hidden deep in the heart of the unforgiving desert. An adventure prompted by loyalty to an endangered friend — and spurred on by lies and treachery — it leads Amelia Peabody and her intrepid family into a nest of vipers lying in wait at a remote mountain fortress. And when a dark past and a shocking mystery are ultimately discovered, a loved one may be lost forever.