The great Sherlock Holmes has a new case. A terrible crime took place in the house of a very influential lord: someone destroyed a priceless collection of weapons and caused a terrible pogrom. However, the famous detective quickly identified the culprit. It turned out to be an old gardener! But Lucius Adler, Holmes's ward, and his friends do not believe in this version. The old gardener could not have committed this crime, it was done by someone who has remarkable, even supernatural power... But who is it? And what is its purpose? Lucius and friends get down to business again! The book is a nominee for the prestigious literary prize Ulmer Unke and the “Best Children's Book” award on the portal Lovelybooks.de.