Rome: maverick military historian Myles Munro is on holiday with girlfriend and journalist Helen Bridle. He's convinced a bomb is about to be detonated at the American embassy. New York: a delivery van hurtling through Wall Street blows up, showering the sky with a chilling message: America is about to be brought down like the Roman Empire.

The greatest discovery of the 20th century. Kept secret. Until now. Berlin, 2015 - a well-connected SS commander is found dead, having protected the last secret of the Nazi empire for 70 years. A discovery by Nazi scientists so potent it could change the balance of world power - forever. Led by misfit military historian Myles Munro, an international team begin to piece together the complex puzzle left by SS Captain Werner Stolz.