Two dates—same night! Major oops. When Casey Cartwright's brother begs her to be nerdy Dale Kettlewell's date to the sure-to-be-boring Honors Engineering Awards, Casey says yes. Even though Dale is totally not her type… and might have a crush on her. Ugh. But it's a nice thing to do, and Casey's always been the "nice" girl. But now, that night conflicts with the biggest event of the semester, the All-Greek formal. Casey already has a date lined hot transfer student Rob Howell. He's her plan to get over her sexy-slacker ex, Cappie. And even nice girls get to be bad sometimes, right? What to do? With a little help from BFF Ashleigh, unwanted advice from frenemy Rebecca Logan and even a push from Cappie, what Casey does may surprise even herself….

They've fought over guys, sorority elections and who gets the last Cheeserito. Casey Cartwright thought that made her and her ZBZ little sis Rebecca Logan closer. But when Casey's ex, Evan, nominates Rebecca as the next Omega Chi fraternity Sweetheart and Rebecca hesitates, Casey vows to play hardball. ZBZ's status on campus depends on Rebecca winning that title. It's time for some sisterly guidance…. Meanwhile, Casey's brother Rusty wants to create a truly spectacular legacy for his fraternity, Kappa Tau, and KT prez Cappie is hoping to live up to Casey's expectations for their fragile new relationship. The pressure is getting to everybody. When Casey goes overboard trying to advise Rebecca on how to win Sweetheart, things reach the breaking point. Will a surprise finish to the competition shake everything apart, or is it just the shock needed to bring best frenemies together?