The rarely seen tale of espionage love and treason set in a Europe on the brink of war, Det hemmelighedsfulde X, casts director Benjamin Christensen in a major role as Lt. van Hauen. As he prepares for impending war, the story revolves around his loving wife, who has become the object of the unwanted attentions of a questionable count. In part because human nature changes little, the fully satisfying drama engages on multiple and sophisticated levels. The plot turns on points of honor, loyalty to country, fidelity to family, and the treachery of greed and war.