It's the final days at the Summer House and to commemorate the end of summer, the housemates throw a wedding-themed party for Kyle and Amanda. Hannah, Paige and Ciara navigate their complicated friendships in the wake of Des' visit, while Lindsay and Stravy continue their stormy relationship, making the house question whether they are headed toward marriage or ending it for good.

In the dramatic conclusion of the Summer House reunion, Carl discusses his struggles with sobriety. Luke accuses Hannah of turning the house against him, while Paige is caught in the middle of Hannah and Amanda's fractured friendship. Finally, tension comes to a head when Hannah is confronted about what she and her new fiancé Des did in Kyle and Amanda's bathroom, leading to shocking admissions and shaking the house to its core.