Per Rule 259, Harper Campbell keeps her life tidy- academically and socially. But the moment Sterling Lane transfers into her tiny boarding school, he intentionally breaks every rule she lives her fragilely constructed life by. Sterling is the poster-child for jaded, spoiled, rich boys, topped off with a smug little seditious smile. Worst of all, Sterling has perfected the role of a charming, misguided student trying to make amends for his past transgressions, and only Harper sees him for the troublemaker he absolutely is. But when her twin brother, Cole, falls victim to Sterling’s influence and could be expelled, Harper decides to beat Sterling at his own game and take him down. As Harper breaks Rule after precious Rule in her battle of wits against Sterling, she’s horrified to discover that perhaps the two of them aren’t so different after all, and there could be a lot more life to live outside her rules. Teaming up with Sterling to save her brother might be the only way to keep from breaking the most important rule-looking out for Cole.