17 year old Mia Silvers is the favorite sister of Thomas Silvers. She's known the boys (Before You Exit) since she was 12, and loves them all to death. Connor McDonough is one of Thomas's closest and most trusted friends ever. One night Connor and Thomas find out Mia's boyfriend (and one of their friends), Rick, cheated on and dumped Mia. As a result of that,Thomas decides that none of his friends would are allowed to date his baby sister. Months after the break up, two things happen. Mia gets invited to join the boys on the 'Resolution Tour,' and Connor and Mia catch feelings for each other. They both know how risky this relationship could be for both of them, so they decide to keep their relationship somewhat secretive. The question is not whether Thomas will find out, but if he will let the two lovebirds be.