The roommates return from Italy and couldn't be more excited to get back to the Jersey Shore. But a drama storm is brewing as The Situation threatens to destroy Snooki's relationship with Jionni.
Vinny weighs his options: Should he stay at the Jersey Shore house or head home to Staten Island? Snooki fights with Jionni, and the roommates are back to their usual antics- partying and tanning to the extreme. Vinny ultimately leaves the house.
The roommates struggle to adjust to life at the shore without Vinny, while The Situation confronts his own internal demons. But it's also Pauly D's birthday -- and he gets the best present of his life! Mike deals with jealousy and storms out of the house.
The Situation returns only to find out that Danny has threatened to get new roommates. The girls hire strippers for Pauly D and The Situation's wild birthday party. The night out turns ugly when Sammi gets into a huge bar fight. The cast then goes to Staten Island to get back Vinny.
Vinny returns and everyone celebrates. The Situation tries hard to be nice but ends up annoying the boys. Snooki struggles with an uncomfortable condition.
The Situation secretly gathers information to bring down one of his roommates -- and for once it isn't Snooki. JWOWW's relationship with her boyfriend starts to fall apart when she questions his priorities, and Pauly D discovers he has a new stalker.
All of the roommates are focused on courting their current flames, but there is never peace in the house. One of the roommates causes drama with Snooki and Deena, while JWOWW's skimpy outfit creates a problem for Roger. Everyone goes to Karma and the club is going crazy with fights and other chaos. The roommates prepare to fight if they have to but when someone touches JWOWW the wrong way, Roger snaps and fights the guy.
Mike prepares to confront Jionni; Deena and Snooki go fishing on a boat, and try to survive a near-death experience by a shark attack; Snooki buys a mini-bike for Ronnie; JWOWW confronts Pauly's stalker; Snooki and Vinny may have a relationship when they spend a night together drinking.
When The Situation and The Unit decide to stir up trouble, The Unit lands in jail; meanwhile, JWOWW plans an anniversary surprise for her boyfriend and Pauly D and Vinny play a prank on JWOWW. Pauly D spots Angelina briefly at Jenkinson's.
A huge fight breaks out after Mike tells Jionni he hooked up with Snooki; Deena faces a difficult truth about Joey; some of the roommates go camping while Pauly and Vinny pull off a big prank.
Another summer in Seaside Heights comes to a close as Hurricane Irene batters the East Coast in the Season 5 finale. As the gang prepares to leave, Mike continues to cause trouble by starting a rumor about Deena's sister, while Pauly and Vinny pull one more prank on the roommates. The roommates say goodbye to Seaside Heights with tears and hugs, unaware if they will return.
The cast of 'Jersey Shore' is back together to dish about all the drama in Seaside Heights. The cast tell all and Mike leaves the reunion briefly as the cast talks about his drama.