London, 1889. The city is gripped by fear: night after night, the Jack the Ripper murders again and again, always managing to evade the chase. As a gesture of “goodwill,” the Serbian king sends to the London police a writer and detective, Milovan Glišich—an exceptionally sharp man who once managed to expose Sava Savanović, who concealed crimes behind so-called vampire attacks. However, help in hunting down the maniac is only a cover: Glišich has a secret mission from the monarch, and the fate of the crown—and his only daughter’s life—depend on it. And the deeper he goes into London’s misty streets, the clearer it becomes: something far more terrifying than human cruelty lurks in this story.