The storyline centers around a serial killer named Lord Blackstone, whom Holmes takes down at the beginning of the movie. He escapes his execution and then sets in motion a plan to retake America, which was weakened by the Civil War. The character of Moriarty is also waiting in the background but not really revealed during this movie.
For those who get the Blu-Ray, the movie looks and sounds great in the high-definition format. Both the cinematography and the CGI used to bring Victorian-era London to life look wonderful in HD. The extras include about 50 minutes worth of behind-the-scenes and making-of material, as well as a Maximum Movie Mode, which plays the movie with clips of the actors and director Guy Ritchie discussing the filmmaking process. There is a very good amount of quality bonus material for those who like going through the extras.
Overall, the movie is very good. Downey Jr. and Law do an excellent job as Holmes and Watson, and they did not try to be carbon copies of prior live-action versions of the characters. Like Cumberbatch, Downey portrayed Holmes as a quirky, almost antisocial character who always observes and analyzes. Thankfully, Downey and Cumberbatch played the characters very differently, as the character in the movie is depicted as much more of an action hero who is more than willing to jump into a fight and allows Downey Jr. to display his martial arts skills. While I like the BBC series better, mainly because it is set in the present day and can focus more on the secondary characters than the movie can, it is still very enjoyable, and worth checking out.