The great detective Sherlock Holmes (Robert Downey Jr.) has an unusually clear logic even when he puts someone to death. However, he is a "freak" in his private life, at least in the eyes of his assistant Dr. Watson (Jude Law). They personally brought the "dark wizard" Lord Black (Mark Strong) to justice. Before he died, he said that death was the beginning. Then Irene Adler (Rachel McAdams) appeared beside him and asked him to help find a missing person, and there was a scary shadow figure beside her. It is said that the dark wizard has been resurrected, his grave has been destroyed, and the person lying in the coffin is someone else. It's time for the great detective Sherlock Holmes to take action again, but the investigation process has been dangerous from the beginning. Assistant Dr. Watson almost died during the investigation, and Holmes was also caught in a series of mysteries. The film is based on the famous comic book of the same name, written by Lionel Wigram. In 2010, Robert Downey Jr. won the 82nd Academy Award for Best Art Direction, two nominations for Best Original Score, and the 67th Golden Globe Award for Best Actor in a Musical or Comedy.