Mean Girls is a 2004 teen comedy written by Tina Fey. After Cady Heron (Lindsay Lohan) moves with her parents from the wilds of Africa to a suburb in Illinois, she finds herself thrust into an even more treacherous environment -- the American high school. Cady, who has been homeschooled by her parents for her entire life, is both amused and confused by the social behaviors of her fellow students. As soon as she arrives, Janis (Lizzy Caplan) and Damien (Daniel Franzese) befriend the inexperienced Cady and teach her about the complexities of the different school cliques. Cady is especially interested in the Plastics, the popular, catty girls led by Regina George (Rachel McAdams). When the Plastics decide to let Cady join their clique, Janis convinces Cady to spy on them to help her break apart their evil group. But as Cady begins to fall under the spell of the charming, yet conniving, Plastics, she begins to take her role as a mean girl a little too seriously and starts to lose her true identity.moreless