Summer 1868. Sherlock Holmes fourteen. He is forced to spend the holidays in the estate of their relatives and I am sure that in front of him waiting for a very boring summer. But suddenly two local residents die of a mysterious disease, like a plague, and Sherlock is in the midst of dangerous and mysterious events. Having established that the death of these people was violent, young Holmes begins to investigate and uncovers a diabolical criminal intent. Now he will start the match with the dangerous and cunning villain, nurturing monstrous plans.