The big-screen adaptation of Twilight, Stephenie Meyer's bestselling vampire romance, is aimed squarely at its key demographic: teen girls whose idea of Prince Charming is a brooding, pale, undead teen who could kill you instantly at any moment. Such a prince is more fascinating than frightening to new girl Bella Swan (Kristen Stewart), who moves to the rainy-gray town of Forks, Wash., to live with her dad (Billy Burke), the local sheriff who's puzzled by a series of "animal attacks." On her first day at school, Bella appears to (visibly) nauseate her lab partner, Edward (Robert Pattinson). Turns out the scent of her blood is this vampire's "brand of heroin," and his struggle not to kill her causes an irresistible pull toward her. Whether he's attracted for the normal reasons or because she smells especially sweet to him is vague in the book and even less clear on-screen; nonetheless, Bella falls hopelessly in love with Edward, which sets her on a dangerous path when a few nomad vampires show up in town, one particularly keen on tracking the human.