The night of Belly's debutante ball is jeopardized when Susannah's secret she's been harboring all summer is revealed. A brother steps in to save Belly and a confession from Conrad alters the trajectory of Belly's summer forever.
As their time in Cousins winds down, Belly finds herself wondering: What Would Susannah Do? Throw a massive party, obviously. But will the festivities bring them the closure they need, or just stir up new problems for everyone?
The summer house is for sale, but Belly, Jeremiah, and Conrad won't let it go so easily. While Conrad works on a secret plan, Belly and Jeremiah try a more direct route.
Belly joins Jeremiah on an important search, but when tension over their past threatens to get in the way, they have to find a way to heal their rift in order to help Conrad.
After a painful revelation, Belly, Jeremiah, and Conrad are trapped in close quarters for the night. Emotions run high as Belly must reckon with past and present to decide her future.
Taylor returns to play in the Cousins beach charity volleyball tournament. Steven finds himself in over his head with Shayla's wealthy friends, and Cleveland helps emotionally distraught Conrad. As the summer heats up so too the emotions.
It's the 4th of July, the fathers have come to Cousins for Susannah's annual party at the beach house. Tensions flare between Conrad and his father. Belly and the Fisher brothers make margaritas, and chaos ensues with dire consequences.
Believing that Conrad might act on his feelings for her, Belly makes a decision that proves painful and straining on the brothers' relationship. Steve finally gets to work in the country club. Laurel and Susannah have a night out.
It's Belly's birthday, her best friend, Taylor, arrives to celebrate. Conrad's friendship with Cleveland grows while the friendships between Belly, Taylor and the Fisher Boys are tested. Laurel and Susannah's secret finally comes to light.