Belly, her brother, and mom head to Cousins beach to stay with Susannah Fisher and her sons, Conrad and Jeremiah. These two close families have spent every summer together. But this summer in Cousins is different.

It's Belly's first day as a debutante, she begins to wonder if she made the right choice when she said yes to Susannah's invitation. Cam complicates Belly and the Fisher Boys' relationship meanwhile, Laurel is intrigued by a fellow author.

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.

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.

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.

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.