Only through magic was James Moriarty, the sworn enemy of Sherlock Holmes, able to survive his confrontation with the master detective. However, to regain the last, central part of his personality, he engaged with the powers of the Necronomicon, thereby surrendering himself to ancient, terrifying deities that sought to use him as a gateway to their world. While Holmes was able to prevent this at the last moment, Moriarty's fate seemed sealed - the demonic gods pulled him to their side, into a hell of eternal torment. Now, a year later, he unexpectedly returns - and has a new mission. The concept by author Sylvain Cordurié to combine the classic Sherlock Holmes, the sober analyst of Conan Doyle, with contemporary fantasy takes on a new dimension in this solo appearance of the "Napoleon of Crime.".