Sammi’s return to the Shore house leaves Ronnie at a loss for words. Snooki’s feelings for Vinny continue to deepen. Mike hooks up with a girl who he's convinced smells like cheese but doesn't realize he's been pranked.
Snooki’s summer of hookups comes back to haunt her. Mike pulls the ultimate prank on Deena and Snooki. But the rest of the guys have the last laugh, ditching Mike for taking too long to get ready for dinner.
After Sammi leaves the house, Ronnie is an emotional wreck. With the girls taking Sammi’s side and the guys not knowing how to cheer him up, Ronnie feels like he has no friends left in the house.
Ronnie and Sammi’s tumultuous relationship comes to an end. When Ronnie destroys everything Sammi owns, she must decide whether or not to leave the Shore.
Ronnie’s over-drinking causes some painful side effects. Snooki meets a guy who may or may not be engaged. And Pauly makes peace with an old nemesis
Ronnie and Jwoww make up leading to Sammi punching Ronnie in the face. Vinny picks up a girl with an overbearing family. And Mike learns Deena’s dirty little secret.
After Snooki is arrested, she becomes depressed until she meets a new guy. Deena meets Ronnie’s stunt double. Meanwhile, Jwoww’s relationship with Tom comes to an end.
Sammi decides to make peace with Snooki and Deena. Jwoww runs into her old flame Roger and sparks fly. And Snooki gets arrested for public intoxication.
The fight between Sammi and Jwoww causes tension in the house. Ronnie and Sammi continue to isolate themselves. When Ronnie finally decides to hang out and have fun with the rest of the house, Sammi feels all alone.
With Angelina gone, Snooki brings her friend Deena to the Shore for the summer. The tension between the girls from Miami finally explodes as fists and extenstions go flying on their first night in the house.
The housemates talk about the drama in the house. Angelina is confronted after deciding to leave the house.
Questions are answered when Snooki, the Situation, Pauly, JWoww and the rest of the gang return for more insight into Season 2.
Pauly and Vin each have a final date with their Miami girls, while Sam and Ron's last supper quickly devolves into a fight. Then Jenni stirs things up between Pauly and Mike, leading to a drama-filled final night in the hot tub.
Everyone is frustrated with Mike for being off his game - he gets the roommates kicked out of a club, gets the car towed, practically burns down the house, and proves to be a failure as a wingman for Pauly. Twice!
Vinny decides between two sets of girls. And with Angelina gone, Snooki thinks it's time that she and Jenni bury the hatchet with Sam. But Snooki's happiness is short-lived as Mike becomes increasingly belligerent with her.
Mike reunites with his Canadian hottie, providing entertainment for the whole house. And Angelina tells her roommates how she really feels about them, sending Snooki into a frenzy and finally pushing things over the edge.