AllMovie

A mysterious murder at the Buckingham Palace attracts the attention of the legendary detective Sherlock Holmes (Will Ferrell) and his trusted companion, Dr. John Watson (John C. Reilly). During their investigation, they realize that there's more to the case and discover a dastardly plot to kill the Queen of England in the next four days. Together, they must use their masterful skills of deduction to prevent the unknown assailant's plans. Written and Directed by Etan Cohen.