This is a tale of a bad girl ('Ivy', so named after the lurid cross-with-ivy tatoo high on her thigh which she flaunts at every opportunity) who works her way into the heart of a lonely outsider schoolfriend and, from there, into her family's affections. Without giving the game away, Ivy has her own agenda and all does not end well.
This movie has some plot in common with "American Beauty"; if you're a Dad who's ever noticed your daughter's schoolfriends I dare say you'll enjoy it. Drew Barrynore gives a strong performance as Ivy - however the movie is entirely reliant on her role with the surrounding characters being little more than support to that, so if you don't like Drew as an actress don't bother with the movie. Also this was made in 1992 so shows it's age stylistically, although the plot is dealing with etermal themes of seduction and betrayal which haven't dated. The sex scenes are fairly explicit.