Deranged is a recent (2012) horror/thriller/monster movie that's decent enough. For comparison's sake to recent similarly themed Korean movies; it's not near on the level of say The Host, but it's quite better than incredibly disappointing Sector 7.
SPOILERS AHEAD!
Here's your story: A severely dehydrated and decomposed body washes up on shore somewhere in Korea. The medical examiners are a bit baffled at the cause of death, but alert the police that this isn't the first identical case they've seen. Soon enough, more dead bodies start arriving by the handful, then dozens, then hundreds, across the whole of Korea. Widespread panic sets in, and it quickly becomes clear that some type of deadly outbreak is underway.
With few clues at all, the authorities fortunately catch a break when they observe some of deaths occurring in real time on video cameras throughout the country. What they see appears to be people desperately trying to drown themselves as if they were possessed or on drugs. Another break in the case soon appears when one of the bodies is recovered before it can make it to a waterway to drown itself. What's inside the body are mutated parasitic worms that have latched on to the human nervous system in order to feed & reproduce.
The worms feed on the host, requiring massive amounts of water to stay hydrated, until they are fully grown. Once in the adult stage, they drive the host to the nearest body of water where they can escape in order to reproduce. Surgery is not an option, but at least the doctors and scientists can now study the parasites and try to find a way to kill them. They better find a solution quick though, because the epidemic is spinning out of control.
The pacing of the early half of this movie is really nicely done. The outbreak occurs suddenly and without explanation, and the tension is palpable as thousands of people are soon contaminated, and efforts to contain the problem are not working. Before long, infected people are everywhere, and their zombie like insistence to get to water is entertainingly portrayed. This part of the movie certainly gives you a "we're all screwed" impression that the end of the world is near.
Miraculously, there already exists a solution for the problem, in the form of a rather obscure over the counter drug that was recently discontinued. The general public races out to buy up the remaining supply off the shelves, while the government works to restart production as quickly as possible. The lone pharma company that makes the drug can't meet demand alone though, and being a dickish pharma company, they don't want to release the drug's formula because of the profits at stake.
The outbreak, the government's efforts in containing it, and the pharma company's involvement are all effectively portrayed. There's also some lingering concerns as to how and why this outbreak started, and why this otherwise unimportant drug is the cure all. It makes for an interesting case study that covers a wide range of the implications of modern medicine & science, corporate power & greed, etc.
Where this film fails to succeed is on a personal level. While the wider focus is on the overall problem at hand, there's also a separate focal point involving 2 brothers and their families affected by the epidemic. These personal stories are attempted to be interjected in similar manner as in The Host, to give you a family/personal connection to the overall monster/disaster story, but it's not very effective. Part of the problem is the actors and actresses don't seem to mesh together well, and worse, their interpersonal stories are not very well written for them. I simply did not care about the cop and the relationship with his estranged scientist wife because of the cursory nature of it. The other brother's efforts to save his family are undermined by a similar problem.
These stories are underwritten and seemed forced into the plot without much foresight. Either they should have devoted more effort developing these characters before and during the events, or they should have dedicated less time to them altogether. As it stood, it came off as a somewhat half-assed attempt to have you invest in some random characters as they reconnect with one another while under duress. Did not work!
Overall, this film's not bad for what it is. It works OK enough to slightly recommend, and it does so on a moderate budget for a horror/monster film.
Bottom Line: 6 or 7 stars or so. 6 stars it is.
