1793. As the Terror begins to cast a great shadow over France, Thomas Pryce, the new Vicar of Deal, crosses the Channel to find the missing parents of his beautiful French wife. Facing grave dangers, he makes his way to Brittany where he not only discovers the fate of his in-laws but also uncovers a plot which threatens to topple the British monarchy. Fighting against a sinister secret society in a race against time, Pryce battles to thwart the plans...