Sherlock se enfrenta al caso más complicado de toda su carrera. Las pistas son escasas, pero le guían hasta el caso de un asesino difunto al que alguien está emulando. Durante la investigación, en compañía del Dr. Watson, descubrirá por primera vez unas circunstancias que desafían la lógica y la razón, retando a su intelecto de un modo que el detective quizá no pueda soportar...

When a new student arrives at Bryton Secondary School in London, England, she brings with her an evil that consumes the school. A nightmare that no one can possibly hope to wake up from seizes the students, haunting their waking and sleeping moments. No one is spared from this living nightmare, certainly not Bryton's consulting detective, or his friends and family.

In 1992, Sherlock Holmes and some of his friends were attacked in their dreams. Now, it seems as if the evil has returned. Sherlock (BBC)/A Nightmare on Elm Street Crossover.