What would you do if a vampire moved in next door?  That's the question this movies asks as young Charlie Brewster gains a most unwelcome neighbor at the beginning of the movie.  Charlie isn't the smartest guy in the world but he does figure out that a vampire has moved next door and immediately tries his best to tell others about him... a strategy that is obviously doomed to failure since no one will believe a hysterical teen yelling that a vampire next door is killing people.  Without giving away any more of the plot, most of the rest of the movie involves Charlie and his friends trying to survive long enough to kill their new nemesis.