The second season opens with the annual Greek Week competition, and Rusty and Calvin strive to find a neutral friendship zone despite their opposing house loyalties. Meanwhile, Casey must decide the consequences of Rebecca's wild spring-break actions, and Rebecca's continued bad behavior doesn't help matters.
As ZBZ prepares to hold a crush party, Casey and Ashleigh realize they both have a crush on the same guy (Jesse Williams). Elsewhere, Rusty turns to his new RA, Max (Michael Rady), for advice on his education.
Casey and Rusty organize a casino night in order to help a debt-plagued Ashleigh. Elsewhere, Evan struggles with accepting the fine print on his trust fund; and Rebecca wants to give Cappie money so he can buy a new car.
Cappie fears Rusty will uncover a Kappa Tau mystery. Meanwhile, Casey takes a liking to Max; Ashleigh tries to cheer up Rebecca; and Calvin's boyfriend suggests that he have more gay friends, so they go to a gay bar and are surprised by whom they see there.
The ZBZ gals attend a sorority convention in Florida, and Casey fears that Frannie plans to change some rules regarding elections. Elsewhere, Kappa Tau hosts an engineering-department party in order to raise some cash, but the fiesta gets out of hand.
Casey's sorority sisters size up Max when she brings him to the formal. Meanwhile, Ashleigh attempts to find Rusty a date; and Cappie and Rebecca hang out at the empty ZBZ house while everyone else is at the formal.
As the ZBZ presidential election nears, Frannie spreads lies about Casey, so Casey retaliates by stooping to her level. Elsewhere, Calvin must deal with the fallout from cheating on Michael, and Rusty runs into his ex, Jen K., while out on a date with a new girl.
Rusty uncovers a secret regarding Dale's old high-school buddy (Dan Byrd), but he's hesitant to share it with Dale. Elsewhere, Ashleigh is caught in the middle of her friends' rivalry as she adjusts to her new role in ZBZ.
Casey struggles to make a decision about how to spend her summer when she gets an internship offer and learns of Max's plans, becoming so troubled that she seeks counsel from Lauren Conrad in a dream. Elsewhere, Rusty is determined to do whatever is asked of the pledges to make it through Hell Week.
Casey returns from her summer internship with secret plans to move out of her sorority house. Elsewhere, Calvin's high-school buddy Andy (Jesse McCartney) begins his freshman year and gets courted by both Calvin and Rusty's fraternities; and Rusty adjusts to living at the Kappa Tau house.
Rusty, eager to take part in Rush Week as a sophomore, attempts to recruit Andy to pledge Kappa Tau, while Calvin tries to sell Andy on Omega Chi. Elsewhere, Casey and Ashleigh doubt Rebecca's work as a mole and suspect that she may be a double agent for Frannie.
Casey wants Max and Cappie to get along, so she seeks advice from Prof. Freeman (Janeane Garofalo). Elsewhere, Andy becomes Rusty's rival as they both try to impress a new transfer student; and a guy getting a lot of attention from the ZBZ gals is only interested in Ashleigh.
Rusty is reluctant to be Andy's big brother because he's angry over Andy and Jordan's hookup. Elsewhere, Evan's brother, Patrick, visits and hits him up for money, and Casey and Rebecca think they've figured out who's been stealing the ZBZ food supply.
Casey challenges the IKIs to a game of dodgeball, hoping to prove the passion of ZBZ's sisterhood to Frannie as well as win over new pledge Jordan. Meanwhile, Rusty's plan to get Dale to leave their apartment once in awhile backfires and instead they both face eviction.
Casey's grand-big sister, Kiki, returns to campus for her wedding, prompting Max to propose to Casey. Meanwhile, Rusty and Jordan bond while picking up flowers for the ceremony and share a kiss, and Rebecca kisses Robin during a bachelorette party game.
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 (Helen Slater) that needs an intern, and Ashleigh considers taking her relationship with Fisher public.
In an attempt to impress Cappie, Rusty tries to solve a mystery involving a secret society he stumbles across on campus. Meanwhile, some of Frannie's defectors ask to return to the ZBZ house, and Rebecca seeks dating advice from Calvin as she prepares to go out with Robin.
As midterms approach, awkward study groups form: Cappie's women's studies group includes Casey and two girls he's been dating, and Rusty's art-history group includes Jordan. Meanwhile, Rebecca asks Evan to help retrieve her laptop from her towed car.
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.
As the Homecoming Week float competition heats up, Rusty and Ashleigh work hard to obtain a win while Casey and Cappie try to avoid one another. Elsewhere, Evan learns that he may lose his trust fund, and Ashleigh uncovers a secret of Fisher's. Tim Matheson directed the episode.
In the second-season finale, Kappa Tau hosts an "End of the World" party, and Casey struggles with conflicting feelings she has for Max and Cappie. Meanwhile, Ashleigh is accused of sabotaging a homecoming float, and Dale and Calvin take a purity pledge.