It is 1761. Prussia is at war with Russia and Austria. As the Russian army occupies East Prussia, King Frederick the Great and his men fight hard to win back their homeland.

In Ludwigshain, a Junker estate in East Prussia, Countess Marion von Adler celebrates an exceptional harvest. But this is soon requisitioned by Russian troops. When Marion tries to stop them, a Russian Captain strikes her. His Lieutenant, Ian Fermor, defends Marion’s honour, but is stabbed for his insubordination. Abandoned by the Russians, Fermor becomes a divisive figure on the estate.

Close to death, Fermor dreams of the Adler, a numinous eagle entity, whose territory extends across the lands of Northern Europe and which is mysteriously connected to the Enlightenment. What happens next will change the course of human history…