And again the time comes when law enforcement guards are unable to cope with another powerful villain who breaks the law. And then a real detective professional, the legendary Sherlock Holmes, gets down to business. But he prefers to deal exclusively with private affairs, because he does not like to report to anyone about his actions and ask permission to perform this or that action. But this time, things are very, very serious. Assassinated the future king of Austria. How were the criminals able to bypass the palace guards and leave, having done their dirty deed, unnoticed? The local police have run amok trying to figure out who is behind this political crime. And only Holmes and his faithful friend Watson are able to solve the case, getting to the bottom of its very essence. Meanwhile, the assassination of the prince has allowed other strange crimes and fatal events around the world to occur. Sherlock Holmes immediately realized that he had to fight a really worthy opponent. Confidentiality, intrigue, political ethics and mortal danger await Holmes and Watson on the way to the truth, which will be a real shock for all the heroes of this complicated case that can forever change the fate of the most legendary detective.