Amy is fine living in the shadows of beautiful Lila and uber-cool Cassie, because at least she's somewhat beautiful and uber-cool by association. But when their dates stand them up for prom, and the girls take matters into their own hands--earning them a night in jail outfitted in satin, stilettos, and Spanx--Amy discovers even a prom spent in handcuffs might be better than the humiliating 'rehabilitation techniques' now filling up her summer.