Chelsea Pottorff is the bad girl at Beldon high. Her brother Sam Pottorff is a bad boy. Trevor Moran, Sam's friend, is a good boy. Chelsea reunites with her brother and introduces the O2l boys to her bad girl crew: Herself, Andrea Russett, Jenn Mcallister, Melissa Finn, Lia Marie Johnson, Roxxanne Peterson, Stephanie Oxford, and Shelby Swan. She is the baddest kid in school along with Sam Wilkinson and his crew:Himself, Shawn Mendes, Cameron Dallas, Nash Grier, Hayes Grier, Jack Johnson, Jack Gilinski, Aaron Carpenter, Taylor Caniff, and Carter Reynolds. Chelsea and Jack are the baddest kids, even bader than their own crews and Sam. Jack has fucked almost every girl in the school and has gotten in trouble a million times. Chelsea is the same. She nearly fucked every boy in school. She likes Trevor but he's the good kid. Trevor likes her but she is a bad girl. Chelsea has family, social, and other issues that break her, make her worse and badder, cause her to kill, and cause her to self harm. Trevor has social, and other issues that break him, and cause him to self harm. She gets worse but is still bad. Trevor is still falling for her. The good boy and bad girl, can't be together. Will Trevor turn bad? Will Chelsea turn good? Who will change? Will either of them change? Find out in BAD GIRL. GOOD BOY.