Detective Holmes (Robert Downer Jr. Even when he kills people, his logic is extremely clear even when he is methodical in handling cases, but he is a "freak" in his private life. At least in the eyes of his assistant Dr. Watson (Jude Law), he is such a person. The "dark wizard" Lord Black (Mark Strong), who they brought to justice with their own hands, said before his death that death was the beginning. Then Eileen Adler (Rachel McAdams) appeared by his side and asked him to help find a missing person, and there was a ghost-like figure beside her. It is rumored that the dark wizard has been resurrected, his tomb has been destroyed, and there is someone else lying in the coffin. It was time for the great detective Holmes to take action again. However, the investigation process was dangerous from the beginning. His assistant Dr. Watson almost died during the investigation, and Holmes was also caught in a series of mysteries. This film is based on the famous comic book of the same name, written by Lionel Wigra.