Kelsey Mays knows everything there is to know when it comes to loving a bad boy. They're uncaring jerks who will leave you brokenhearted and alone without a second thought. So when Julio enters her life, she pretty much has him all figured out. But when they become lab partners in a project she would rather not do, she becomes dependent on him. And he knows it. Whatever it takes, Julio plans on breaking her out of her closed, cold chains and showing her a life worth living. A life that doesn't have plans. Through love, bets, loss, lies, and tears, Kelsey must learn what it means to put your trust and love in one person. Even if that person just so happens to be a bad boy.