The plot: A trio of college students buy a box with a ghost in it, not expecting the box to truly be haunted.
Kill Katie Malone is basically a combination of the Robert Louis Stevenson short story "The Bottle Imp" and some stupid eBay auctions that caught the attention of the media, when people tried to sell ghosts. Predictably, eBay wasn't very amused, and it's now against their Terms of Service to sell ghosts, haunted items, or other supernatural things.
Apparently, these kids got in before the ban, and they buy a haunted box. Ooooh, creepy. The ghost allegedly has the power to grant wishes, but it's very clingy and family-oriented. If you say anything about abandoning her or breaking up the family, it tries to kill you. The only way to get rid of it is to sell it on eBay.
This is an absolutely ridiculous idea for a movie. The Robert Louis Stevenson story was actually quite interesting, because it offered what seemed like an unsolvable paradox. Kill Katie Malone, however, is just a generic slasher with a stupid plot. I'd have trouble recommending it to anyone, even bored teenagers. If you've got nothing else to do, I suppose you could waste your time on this, but I'm not sure why you would bother, when you could memorize prime numbers or the digits of pi. Either would probably be more exciting than watching this movie.
