For the first time, the veil is lifted from one of the key figures in the Holmes stories - from Mycroft Holmes. The action of the novel is replete with kidnappings, assassinations, and surveillance. Secret agents and their masters weave their intrigues. But Mycroft Holmes, endowed with unprecedented mental power, is able to expose everyone. Mycroft Holmes is the mysterious brother of the great detective, a man of the same extraordinary abilities as Sherlock Holmes. The novel opens the door to the secret kitchen of the British government and sheds light on Mycroft Holmes's entourage. The action is full of assassinations and assassinations, sabotage and espionage passions, and all this is created in the style of Arthur Conan Doyle.