This time Amelia and her dashing husband Emerson set off for a promising archaeological site in the Sudan, only to be unwillingly drawn into the search for an African explorer and his young bride who went missing twelve years back. They survive the rigours of the desert, the death of their camels, and the perfidy of their guides, only to find themselves taken prisoner in a lost city and civilisation. Amelia and Emerson must bravely continue making archaeological finds while doing their best to rescue the innocent...and themselves.