This is one of those dark movies, where it's constantly raining and wet and where the light always seems to be dim. Appropriately enough, this changes to bright and shimmering heat in the very end. As a kid, I hated dark movies. But perhaps it is appropriate in this case, because Seven attempts to be a statement about humanity: no one is without sin.
The seven deadly sins are gluttony, greed, sloth, pride, lust, envy, and wrath. Prime examples of people committing these are being punished one by one, brutally and efficiently, by a psycopathic killer. Detectives, and reluctant partners, William Somerset (Morgan Freeman) and David Mills (Brad Pitt) are assigned to track down the killer. Needless to say, the job gets accomplished. While some might argue it is done surprisingly, I'd argue otherwise.
For once, I wasn't impressed with Pitt's acting. I thought Freeman did a great job. As usual, the villain, John Doe played by Kevin Spacey, provides a chilling performance, even though he is not given as much center stage as, say, Anthony Hopkins was in Silence of the Lambs. In fact, the whole movie seems to hurry through without giving key characters enough time to build up their emotional worth, particularly Mills' wife Tracy (Gwyneth Paltrow).
In the end, Seven does manage to get its point across effectively. While watching the movie itself, I thought it a bit anti-climatic, but when mulling it over later, the images echo very strongly in my mind. One of the most disturbing films I've seen.