A chance encounter with outlaw humans sends the futures of of both species down a new path that will forever change the balance of power. I will not give it away here, although you likely have an idea of what it may be. It is not necessarily a new concept, but it is done with a style that genre fans will likely enjoy.
While the movie is very entertaining it may be a little over-earnest in its execution. The movie has the fangs, gore, and lore that genre fans crave, but it plays out with zero humor. Daybreakers is a grim affair that goes along with the increasingly serious situation that threatens its subjects' existence. If there is one complaint to be made (I am sure there are more) it's the lack of the funny. A few scenes of comedy go a long way.
Still, I cannot complain too much as I did enjoy seeing vampires with a little bite. I found the look and story to be interesting. I liked the way this world felt fully-fledged, I could see the community and how people related to each other. I could see the structure and how people really seemed to take to the idea of being an immortal vampire.
The performances are effective but mediocre. No one really stands out, although Willem Dafoe's vampire hunter seems intent on trying to have a little fun with the situation, but even he must retain a focus on the deadly seriousness of the blood shortage and human hunting.
Bottom line. This is a movie to see. It gives vampires a little of their dignity back while providing a fascinating world to play in and a pretty good story to get involved in. On top of that, it is great to see some of that blood back on the screen.