Twelve stories that stage the mastery of Conan Doyle raising mysterious cases in a few pages. In the first of them, Sherlock Holmes will face Irene Adler, the only woman who has stood up to him, in the famous "Scandal in Bohemia", he will also be forced to follow the risky adventure of "The League of Redheads" and of course, he will end up finding the true culprits of the strange "identity case" or the "Boscombe Valley mystery"... All this with the help of Dr. Watson, as amazed as we are by the detective's incredible deductive skills.