France and Prussia - 1863, When someone close to Edward Tyrington is murdered, he is charged with bringing the murderer to justice. The murky path to catch the criminal leads him through the borderlands of France and Prussia, two countries on the brink of war.

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With the resourceful Catherine Briggs and her suspicious Uncle by his side, Edward uncovers a secret plot that will tilt the playing field of war for decades to come. Will Edward and Catherine foil the plan, and evade the assassins trying to stop them?

This historical mystery set in Victorian France and Prussia provides curveballs and action as Edward and Catherine, two amateur sleuths, investigate their friend's murder.