"Special ID" (or "Te Shu Shen Fen") is not your average Donnie Yen movie, where he takes on the entire world and lives to tell the tale. This is a more down to Earth kind of movie, with the right amount of action thrown into the mixture.
The story is about an undercover police man whose cover is on the line as he has to unravel a gang to expose the leader. But when his former friend and protégé shows up, things take an unforeseen turn.
I will say that the story itself was fairly mediocre, and there wasn't really anything out of the ordinary or anything that hadn't been seen before. But what made it work was the way that the characters were portrayed, as being fairly average people unable to take on a whole gang by themselves.
The fight scenes and action scenes were well choreographed and they had a very realistic feeling to them, whereas many Asian action movies tend to go an extra mile and throw a bit too much gasoline on the fire.
Donnie Yen seems fairly mellow and lenient in this movie, and it served him well, because it adds a good flavor to the movie, making it more realistic and enjoyable.
I am a big fan of Asian cinema, but "Special ID" hardly revolutionized the Asian action genre, nor did it push any boundaries. If you enjoy Donnie Yen's movies, then you should take the time to sit down and watch "Special ID".