School's almost out, and Belly's excited for another idyllic summer in Cousins with her boyfriend, Jeremiah. But her plans go off the rails after she learns a shocking truth.

In the wake of an earth-shattering betrayal, Belly tries to pick up the pieces. Caught in the crossfire, Taylor picks a fight with Steven that ends in disaster.

Belly and Jeremiah plan to keep their big news secret from their families until everyone is reunited in Cousins for Susannah's memorial garden ceremony. Everyone, except for Conrad.

Alone in Philly, Belly turns 21. But her special day turns sour when family disagreements about her future take center stage.

With Jeremiah stuck at the office, a reluctant Conrad gets roped into wedding planning with Belly. En route to New York for a new career opportunity, Steven finds himself with an unlikely travel companion.