At Westerburg High School, an elite clique of snobby girls known as “Heathers” reign supreme. Smart and popular, Veronica (Winona Ryder, Stranger Things) is a reluctant member of the gang and disapproves of the other girls' cruel behaviour. When Veronica and her mysterious new boyfriend, J.D. (Christian Slater, True Romance), play a trick on the clique leader, Heather Chandler (Kim Walker), and accidentally poison her, they make it appear a suicide. But it soon becomes clear to Veronica that J.D. is sociopath intent on vengefully killing the school's popular students. She races to stop J.D., clashing with the clique's new leader, Heather Duke (Shannen Doherty), and leading to an explosive final confrontation with her troubled former lover.