Wounded Doctor Watson is back from Afghanistan. The year is 2010.
Quite good remake in the beginning. Quite weak in the end.
Arthur Conan Doyle (not yet a sir) invented professor Moriarti when his imagination failed. "A Study in Pink" STARTS with it. A plausible revenge story of "A Study in Scarlet" is replaced by a serial killer controlled by the evil genius. [two following paragraphs are censored for spoilers and bad language]
Still it is very well done and a lot better entertainment than Guy Ritchie adaptation.