The accidental death sets up three plots lines. First, Queen "B" Courtney Alice Shayne (Rose McGowan) is on a mission to make sure that nothing happens to her position atop the school hierarchy. Second, good girl Julie Freeman (Rebecca Gayheart) feels badly about killing their best friend and rethinks her membership in the elite group. Third, wallflower Fern Mayo (Judy Greer) is transformed by Courtney into the vivacious Vylette, who gets to replace Liz. There is a fourth member of the group, Marcie "Foxy" Fox (Julie Benz), but she is Courtney's loyal stooge and is incapable of independent thought. Meanwhile, Detective Vera Cruz (Pam Grier) is investigating Liz's death and is questioning the girls.
The character of the detective is a pivotal one in the film because she reveals the flaws of this film. I mean, come on, we are talking about Pam Grier playing a hard-nosed detective, and she gets taken for a ride by a bunch of teenage girls who do not break a sweat. There is some confusion as to circumstances of Liz's death, thanks to Courtney's efforts, but the disturbing fact that somebody called the school pretending to be Liz's mother to explain she would be home "sick" seems to get forgotten by the time the police haul in a suspect. These are not the brightest kids to begin with and their effort to cover up their crime only works because in the end this drama has to be played out at the high school prom and not in some precinct house or juvenile court.
McGowan was nominated for an MTV Movie Award for Best Villain for this film and she has a fine time being the cold-hearted queen of the school the story requires. But the more over the top she goes in terms of being so nasty to those she demands bow down before her that you end up wondering what is wrong with them rather than with Courtney. Gayheart does a good job of playing her uncomfortableness with what is going on, thereby grounding the movie from time to time in something resembling reality, while Benz vacillates between frightened fool and sarcastic sidekick. The cast and the performances are good, but not good enough to cover the problems with the basic story and in the end "Jawbreaker" does not finish as strongly as it started.