A year after capturing Stassi’s heart, Beau Clark is preparing to take their romance to the next level by proposing marriage. But when his attempts to keep his plan a secret make Stassi start to doubt his feelings for her, Beau is forced to deal with the wrath of a “dark passenger” that he hoped had disappeared for good. And as the fighting between Stassi, Katie, and Kristen intensifies, Beau must draw boundaries in his longstanding friendship with Kristen for the sake of preserving his relationship with Stassi.