In a small French town, a series of murders takes place, the investigation of which leads the reader to the headquarters of the world's leading special services, then to the Masonic lodge, then to the "money cellars" of Switzerland, then to the lair of the leaders of the Islamist militants, then to shark hunters from the royal yacht club in Australia. The action-packed novel immerses the reader either in the realities of today's struggle of Russian intelligence with the special services of Western countries or in the details of their joint actions in the persecution of arms dealers from the "general mafia" and in battles with international terrorism, then in the historical past - from the execution of the royal family to the times of the Third Reich. In the police novel "Ghosts of the Russian Castle," the author of the bestselling book "Putin's Hunt for Gold" boldly reveals the secret mechanisms that govern the modern world.