After a summer full of popping and breaking bottles, heartache, "lesbionic" hook-ups, and car-crashing, wall-smashing drama, the cast reunites to open up old wounds and say goodbye to Florence in this explosive reunion.
The gang gets ready to say good-bye to Italy and head back to Seaside Heights in the Season 4 finale, but tensions between Mike and the rest of the roommates leave him doubtful that he'll be joining them back at the Jersey Shore.
Deena continues to pursue Pauly. Later, she and Snooki get an icy reception at a nightclub. Meanwhile, Mike is back to stirring up drama, prompting the whole house to turn on him.
After The Situation's prank on Snooki backfires, the guys visit Vinny's family in Sicily and the girls class it up on a Tuscan wine tour. Snooki learns the truth from Vinny about their hook-up, and now she has to come clean to Jionni.
Snooki is devastated over herfight with Jionni, and decides to take a break from the relationship. Mike thinks it's finally his chance to win her over, but it's someone else who ends up comforting her. Meanwhile, Deena has a pregnancy scare.
Snooki and Deena are released from the police station after their accident. Later, Snooki's boyfriend Jionni visits, but their romantic reunion comes to a halt, and a sobbing Snooki ends the night alone on the streets of Florence.
When the roommates take a trip to the Italian Shore, Snooki and Deena party so hard they wind up in bed together. And when everyone returns to Florence, Team Meatball has a run-in with the Italian police -- literally.
Pauly D and Vinny put on a "Guido-themed" comedy show, while Ronnie and Sammi work once again to patch things up. Snooki becomes so distraught over her rollercoaster long-distance relationship that JWOWW and Sammi decide to intervene.
Airing at a special time, Mike and Ronnie come to blows over Mike's meddling ways. Later, Mike leaves the house on a stretcher.
The boys harass Deena for stealing a girl from Vinny's bed, leading her to anxiety and self-doubt about her relationship with the roommates. Ronnie and Sammi are back to their old ways, but this time The Situation is involved in their drama.
Deena pulls a "robbery" on both Mike and Vinny with a pair of female twins; Mike tells everyone he hooked up with Snooki.
Deena and Pauly D consider the consequences should they smush, while The Situation tries to take his friendship with Snooki to the next level. At the club, Ronnie and Sammi try to be friends but prove that old habits--both good and bad--die hard.
The housemates pack up their hair extensions and Shore Store T-shirts and jet off to Italy for a European adventure -- but the culture shock that awaits them is nothing compared to their shocking new hook-ups.