In 1942, a mysterious technology is facilitating a deadly Blitz. Desperate for answers, British intelligence sets its sights on an installation in Bruneval, France.

As Hitler's shadow engulfs Europe, ancient castles across the continent fall under Nazi control and are transformed to serve the ambitions of the Third Reich.

With Nazi Germany's rise to power, a long-abandoned canal project in East Prussia is resurrected, but the true purpose of this massive waterway comes into question.