London has had a string of murders identical to the Jack the Ripper murders in 1888. The chief of the Scotland Yard calls in Sherlock Holmes, but is surprised to find two of him.
The two Sherlocks are now competing, trying to see who can solve the crimes and find the culprit first.
Sherlock Holmes(BBC's Sherlock) as played by Benedict Cumberbatch
Sherlock Holmes(Elementary) as played by Jonny Lee Miller
Both of them have their respective Watsons assisting them.
Who is the superior Sherlock Holmes?