A Christmas gathering goes horribly awry in this chiller. Some kind of virus affects foue darling youngsters who turn murderously aggressive. Starting out sinisterly slow, the movie builds as the youngsters start bumping off the adults. I wish there had been some kind of back story on what/where the virus started but it's the ambiguity that makes it all the more frightening. Watch this with ORPHAN and OFFSPRING and you may never want to have kids!