This is the live-action version of the TV anime series, DEATH NOTE. They are both relatively similar, though the plot lines have been moved around a bit and a girlfriend was created for the main character, Light. In the anime and manga, there was no girlfriend and so my purist daughter complained loudly when she appeared in the film. However, I advise you to relax and give the film a chance--I actually LOVED what they did with the lady in the film. Early on, she's about as superfluous as a vestigial tail, but later she becomes an important part of the plot--you'll see. But as for the rest of the film, it is true to the original--Light is an evil piggie and L looks and acts much like a cockroach (like in the anime).
As for the story itself, it's a pretty hard film to describe for Western audiences. If you are already an anime/manga freak, then you probably will not be scared away by the odd plot line and story elements about the supernatural. However, for the uninitiated, please try to suspend judgment--the film can be enjoyed by anyone--not just anime/manga fans. I am much more of a casual fan of the genre and enjoyed the film immensely. My wife generally hates anime and loved the film. And, my insane "sold my soul to anime" teen loved the film as well. In light of this, I really think this live-action film is good entertainment for all.
One final note is that the guy playing Light's father is Chairman Kaga from Iron Chef. Throughout the film, I kept expecting him to whip out a yellow pepper and eat it, but unfortunately he did not!
