An insecure high school girl from a single parent household, gets a scholarship to an elite private high school in an attempt to reinvent herself. It's all going well until she finds out the boy she's dating has a crazy and psychotic ex-girlfriend, who suddenly returns from juvie and challenges her to fight it out after school. Now, our sweet and innocent hero has just a few hours left in the school day to figure out how to take down this maniacal beast on behalf of everyone who has ever been bullied.