Based off of the movie Thirteen, this book tells the story of Camila, a sweet girl going into her junior year and has never let a bottle of alcohol touch her lips and has never gone further than kissing a boy. In the beginning of summer she meets Lauren, the troubled leader of the pack of the careless teenagers in her school, with lives full of smoking, drinking and sex. In a stint of chance of rebellion, Camila hangs out with Lauren and unknowingly begins the avalanche of her recklessness which will soon spiral into an uncontrollable chaos.