On a journey that will take them to Tibet, Nepal, China, Italy, and Siberia, the Fargos find themselves embroiled with black-market fossils, an ancient Tibetan kingdom, a lost landmass in the North Sea, Stone Age ostrich egg shards inscribed in a cryptic language, a pair of battles separated by thousands of miles and hundreds of years ... and a skeleton that could just turn the history of human evolution on its head.