I don't remember the last time I've watched a movie as mind-bogglingly intense as this one. Maybe A Clockwork Orange? No, not even that one compared.
The plot is actually pretty simple - just about everyone gets wiped out by a plague in Great Britain. The problem is the survivors - some are OK, and some are infected and are dying slowly.
The cinematography kinda bugged me - much of the camerawork was quick and choppy, but the effects and the atmosphere they created were incredible. I liked this movie a lot, but be prepared for some funky-ass dreams.