In 1853, as the British and Russian empires compete to gain and maintain their place in the dreadful Great Game of political intrigues and alliances whose greatest prize is the domination of India and the border territories, Major Geoffrey Vickers must endure several betrayals and misfortunes before he can achieve his revenge at the Balaclava Heights, on October 25, 1854, the most glorious day of the Crimean War.

The time of the French revolution, and Citizen Robespierre is beheading the French aristocracy. When word gets to England, two noblemen, Sir Rodney Ffing and Lord Darcy Pue take it upon themselves to aid their French counterparts. Sir Rodney is a master of disguise, and becomes "The Black Fingernail", scourge of Camembert and Bidet, leaders of the French secret police.