A lost Nazi bunker in a forest in Germany contains a dreadful secret. Marine archaeologist Jack Howard returns to the lost island of Atlantis in the Black Sea to answer questions about the Atlantis priests that have plagued him. Then by tracking down the 1930s expeditions of Himmler's Ahnenerbe - the Nazi's Department of Cultural Heritage - and its link with Atlantis, Jack realises he is not just on the trail of the greatest lost relics from the past.