Alex is caught between his high school sweetheart and his summer fling; a model moves to town and shows up at Alex's birthday party.

Chloe deals with a huge blow from one of her best friends; although the group tries to stay neutral, Alex gets caught in the crossfire; Madisson and Juliette try to reclaim their territory.

Garrett is jealous of Alex and Kelsey; Kelsey wonders if she sees a future with Garrett; Chloe tries to face up to her behavior; Madisson and Alex deal with being an adult.

Alex deals with the repercussions of his fling with Amanda and debates whether or not to tell Juliette; Madisson steps away from the battle for Alex and catches Brandon's eye; Kelsey and Garrett grow further apart.

Rumors spread about Kelsey and Alex in a hot tub; Madisson and Brandon feel sparks; Chloe considers her relationship with Amanda.

The crew heads to Bimini for a few days of fun in the sun; drama quickly spreads when evidence of Alex and Kelsey's indiscretions surface; Juliette becomes overwhelmed with jealousy while Madisson and Brandon continue to get cozy.