1943: a Nazi expedition searching for evidence of a lost Aryan supercivilisation finds something astonishing within a mountain at Thule in Greenland. In the maelstrom of war the secret of what lies there is lost; for the moment.
The twenty-first century: a young Jew dies in suspicious circumstances in Berlin. The police investigation leads to a far-Right political organisation which it seems is planning something big - something which involves Thule.
Someone has discovered the incredible truth about the place and seeks to turn it into a force which will bring the world to its knees and establish the Fourth Reich. The key to it all is Caroline Kent, harassed executive and former MI6 agent, and the strange powers she seems to be developing; powers which in the wrong hands could bring disaster to Mankind.