Successful PR pro Marni heads home for her older brother's wedding and discovers that he's marrying her high school arch nemesis, who's conveniently forgotten their problematic past. Then the bride's jet-setting aunt bursts in and Marni's not-so-jet-setting mom comes face to face with her own high school rival. The claws come out and old wounds are opened in this crazy comedy that proves that not all rivalries are forever.