On her first day of school, Sarah is snubbed by the more popular girls and ends up becoming part of a circle of girls who are witches.
One by one, it goes through and shows each one of the girls problem. Bonnie was in a fire and left with horrible burn marks, Rochelle is the target of a racist clique, Nancy comes from a broken home, and Sarah is still haunted by memories of a suicide attempt. They all cast spells to improve their lives, and they work. Sarah makes a guy fall in love with her, Rochelle causes her harasser's hair to fall out, Bonnie overcomes her scars and Nancy ends up killing her jerk stepfather, resulting in her mother and her to inherit a bunch of money from him.
As the girls get deeper and deeper into the craft, Sarah realizes that they are taking everything too far. Bonnie has turned into a total snob, Rochelle's tormentor goes completely bald, Sarah's love spell has turned into dangerous obsession, and Nancy has completely turned power hungry. When Sarah makes her desire to leave the circle known, they will not hear of it. Nancy ends up trying to kill Sarah, resulting in one of the best fight scenes EVER.
Overall, some of the stuff referring to the craft in this movie is true. The quarter calls made by the group are actual Gardnarian Tradition quarter calls, and the threefold law is TRUE (I know from experience, lol)