This movie is an adaptation of the Swedish film Let the Right One In. The premise to both the films is that this bullied boy living in suburbia meets this girl who lives with her father but never really leaves her house, and they become friends. The whole thing takes a pretty drastic turn when the audience finds out (before the boy) that the girl is actually a vampire that doesn't age and her "father" is actually just a dude she met that she's been shacked up with and he kills people and gives their blood to the vampire girl so that she doesn't have to kill people.
