After a little white lie about losing her virginity gets out, a clean cut high school girl (Emma Stone) sees her reputation tarnished until she decides to use the rumour mill to advance her social and financial standing. Now all her classmates (Amanda Bynes, Cam Gigandet) are turning against her. Can she find her true friends and put her life back in order before she alienates her patient parents (Stanley Tucci and Patricia Clarkson) and loses the love of her life (Penn Badgley) forever?