Although it is based on Arthur Conan Doyle's characters, the story is an original one, which has the famous detective on the trail of Jack the Ripper. In the dark alleys of nineteenth century London, the notorious Jack the Ripper committed a series of gruesome murders. The story of ''A Study in Terror'' challenges Sherlock Holmes to solve these horrific crimes. This leads Holmes through a trail of aristocracy, blackmail and family insanity. Unlike Scotland Yard, and the real-life story, Holmes eventually discovers the identity of the Ripper.