Rusty is looking into the list of Kappa Tau actives and this makes him very nervous about one member's true identity being uncovered. Also, Casey seems to like Max, Rusty's R.A. And Ashleigh accepts to accompany Calvin and Michael to a gay bar as Michael says Calvin doesn't have enough gay friends.

Tired of the poor treatment they've received the pledges at Kappa Tau fight back. Elsewhere, Evan conspires to use Calvin and Michael's relationship to help a brother who's failing.

The ZBZ women attend their national sorority convention; a party for the engineering department gets out of control; Evan takes advantage of Frannie's absence.

It's the ZBZ Formal and Casey and Max decide to go together. At the event, Ashleigh and Rusty bond. Also, Rebecca decides to skip the event claiming she needs a break from sorority events.

Frannie and Casey sling mud at each other as the sorority presidential election approaches; Calvin faces the consequences after he cheats on Michael.

Rusty finds out a secret about Dale's high school friend and fellow Purity Pledge member, but is uncertain to tell Dale what he knows. Meanwhile, Ashleigh, as the new ZBZ president, finds herself in the middle of a battle between Casey and Frannie as they pursue the Omega Chi's for partnership for the coming school year.

Casey faces a hard decision when she learns that Max is planning to go to Cal Tech for grad school and she is offered an internship. She turns to Lauren Conrad (who appears in a dream sequence) for advice. Also, the pledges are put through Hell Week and Rusty is driven to face the challenge no matter what he is forced to do.

Casey returns with secret plans to move out of the ZBZ house; a new freshman is highly desired as a pledge; Rusty tries to balance studying with life in the Kappa Tau house.

Now a sophomore, Rusty gets to participate in Rush Week for the first time and he is determined to land Andy as a pledge for Kappa Tau, but Calvin feels the pressure from Evan to get Andy to pledge Omega Chi. Who will prevail in the battle for the big man on campus? Ashleigh and Casey start to doubt Rebecca's "mole" abilities and begin to question whether she's actually a double-agent for Frannie's new sorority when the ZBZ girls’ rush week “Project Runway” fashion skit is successfully sabotaged by Frannie.

When Casey discovers that Cappie is taking the same women’s studies class taught by Professor Freeman, she knows that it will complicate her relationship with Max. As a result, Casey decides to enlist the help of her new professor to help Max and Cappie get along. Meanwhile, Rusty starts his first elective class in Art History, and as a lucky bonus meets a pretty new transfer student, Jordan. Although he’s nervous about talking to her, he finds the courage to invite her to a KT party. But the night of the party he learns that some guys have all the luck, namely the new KT pledge, Andy. At the ZBZ house, Ashleigh hires a new hasher, Fisher, who draws a lot of attention from the sisters of ZBZ but, Fisher only has eyes for Ashleigh.

Troubled by the recent discovery that Andy hooked up with Jordan, Rusty is hesitant to take Andy on as his little brother. Will Rusty be able to get past the budding relationship to become the big brother Cappie has been to him? When Cappie hears of Rusty’s reluctance, he takes Rusty aside to remind him that he brought Andy as a pledge to the fraternity and it is his responsibility to be the best Big Brother that Rusty can be for him. Meanwhile, when Evan’s real-life brother, Patrick, comes for a visit, their celebration at Dobler’s is interrupted by Cappie and the three end up reminiscing about their old camp days. But later Patrick shocks and disappoints Evan by asking for money. Frustrated by his brother’s actions, Evan takes it out on Frannie. When Casey and Rebecca believe that the thief responsible for stealing the ZBZ food supply is Fisher, they can’t figure out why Ashleigh won’t accept it. But when they dig a little further, Ashleigh reveals the delicious truth.

When Frannie challenges the sisterhood of ZBZ girls, and Casey retaliates by challenging the IKI’s to a game of dodgeball. Meanwhile, Rusty struggles with the fact that Dale is so in love with their new apartment that he never leaves, so Rusty enlists the Kappa Tau’s to invade the house to scare him away. But the plan backfires when the landlord shows up the next morning with a tour.

Casey’s grand-big sister, Kiki , is back at Cyprus-Rhodes University for her wedding and all the ZBZ girls are invited. Amidst all the wedding frenzy, Max decides it’s time to take his relationship with Casey to the next level and gets down on one knee. Meanwhile, with Andy out of town, Jordan ends up dragging Rusty around town to help pick up the flowers for Kiki’s wedding. When the two discover that the order was never placed, they have to come up with a plan of action however, the plan backfires and puts both of them in the emergency room with identical allergic reactions. The unexpected common bond leads them to share a kiss. Rebecca, in the meantime, soon finds herself in new territory as she kisses Ashleigh’s openly gay big sis, Robin, in one of the bachelorette party game sparking Rebecca’s curiosity.

The KTs race to return a stash of stolen campus goods, hoping not to get caught by security. Elsewhere, Casey sneaks Max into a faculty party so he can meet a visiting professor that needs an intern, and Ashleigh considers taking her relationship with Fisher public.

Rusty attempts to solve a mystery involving a secret service he ran across on campus in hopes of impressing Cappie. Meanwhile, some of Frannie's defectors from ZBZ house have asked to return, and Rebecca seeks dating advice from Calvin as she readies to go out with Robin.

Two girls that Cappie is dating at the same time both end up in his study group. Meanwhile, Rusty is having doubts about his relationship with Jordan, and Rebecca solicits help to retrieve her laptop.

A lonely Casey meddles in Rusty's new romance with Jordan. Elsewhere, Calvin finally gets a new roommate, and then he discovers that the guy has a surprising secret; and Evan and Cappie reignite their rivalry, this time over a secret-society member.

Rusty and Ashleigh try hard to win the float competition, while Casey and Cappie try avoid each other as Homecoming Week heats up. Elsewhere, Evan gets word that he may lose his trust fund, and Ashleigh uncovers one of Fisher's secrets.

After she falls into a manhole risking her life, coupled with the Kappa Tau's throwing an "End of the World" party, Casey is sent into an emotional tailspin, questioning her relationship with Max and her lingering feelings for Cappie. Meanwhile, Ashleigh faces her own punishment with Pan Hellenic after a complaint is lodged by Frannie for the Homecoming Float sabotage. Ashleigh turns to Casey to help fight the charge, but when Casey gets caught up in her own personal drama, she leaves Ashleigh to face Frannie alone. And with Dale having trouble keeping his cougar girlfriend's sexual advances at bay and Calvin trying his best to resist hooking up with his new hot roommate, Grant. Dale convinces Calvin to go in on a "purity pledge" partnership so they can help each resist their most recent temptations.