Brenda returns to Beverly Hills to find her bedroom taken over by Brandon and her parents angry that she dropped out. College registration is too much for Dylan who has a kindred spirit, so he and Brenda pair for a fishing trip to talk about their future. David and Donna try to audition for the DJ's on the California University's radio show, while Andrea tries to get in with the university's newspaper, The Condor, and soon clashes with the egotistical student editor Josh Richland. But Andrea has a more friendly meeting of minds with Dan Ruben, her dorm faculty advisor. Meanwhile, Steve tries to get Brandon in on the fraternity life on the CU campus by pledging the Kappa Epsilon Gamma (K.E.G.) fraternity.

During Rush Week, the girls attempt to pledge the Alpha Omega sorority and the result bores Brenda; reunites Kelly with an old flame, John Sears, whom she can't stand and shake off; exhausts Donna who tries to boost ratings for her and David's radio show; and stereotypes Andrea when she suspects the sorority president of being anti-Semetic. Meanwhile, Brandon is asked to run for student senate, but Steve won't accept his involvement with the senates politics which are unpopular with the fraternity.

Brandon uses Kelly as his date at a university social event to shield his affair with Lucinda from Josh Richland, a snooping student reporter from the Condor determined to dig up any dirt on Brandon. Meanwhile, Brenda and Stewart travel to Palm Springs where they find big complications from a small mistake Brenda makes which leaves them stranded in the desert, where Stuart fumes over and it resulting in her finally breaking off their engagement for good. David rents a piano as a new hobby while Kelly moves back in with him and Donna. Also, Andrea lets Steve use her dorm room after he can't stand living at the KEG house.

Lucinda temporally loses interest in Brandon when she flirts with Dylan to ask him to finance her documentary film. Meanwhile, Kelly and Brandon spend the weekend together at a task force retreat where they meet the university Chancellor, Milton Arnold, Dean Trimble and the Chancellor's teenage daughter Clare, where Brandon and Kelly become more attracted to each other and brush off Josh who's still hounding them. Brenda and Donna befriend a stray dog that escapes from the university's lab, whom they name Rocky. Also, Andrea discovers that Steve is allowing Muntz and his frat buddies to use her dorm room for nooners. Andrea protests, but changes her mind when Steve begins to date her dorm resident advisor, Kathy Fisher.

Brenda and Donna attend an animal rights rally, and are crestfallen when the university refuses to suspend animal testing. After Rocky dies of cancer, Brenda becomes involved with a small group of radicals. She serves as lookout when the group breaks into the university research building and tries in vain to save Andrea's lab (which does not harm animals in its testing). Brenda is arrested. Kelly and Brandon are furious when Dylan refuses to fund Lucinda's film. He finally tells Kelly that Lucinda came on to him. Brandon breaks up with Lucinda and Kelly confesses her kiss with Brandon. Dylan races over to the Walsh house to fight Brandon, but the tension is defused when he accidentally punches Steve.

Brenda calls Dylan from jail in the hopes of keeping her arrest a secret, but he is forced to tell her parents. Brenda's friends avoid her out of fear of being accessories after the fact and Kelly acts especially bitchy because she is tired of Dylan coming to Brenda's rescue. Brenda faces felony charges, as her crime was a federal offense. An FBI agent who had gone undercover with the activists offers her immunity in exchange for her testimony. Kelly apologizes for shunning Brenda. Andrea gives Donna a healthy puppy (Rocky II) to take her mind off Rocky's death. Steve and his overbearing father, Rush, take on a baseball star and his dad in a father/son golf tournament. Steve catches his father cheating and forces him to complete the game honestly. Lucinda receives a grant for her movie and leaves the university. Josh threatens to expose Brandon's affair with Lucinda unless he endorses his campaign for student president. Brandon calls his bluff and Josh eventually has second thoughts.

Donna announces to the gang that she has decided to move to Houston to be a débutante. But Kelly eventually learns that Donna still emotionally fragile since her breakup with David and she's hiding behind her mother just to avoid running into him. Dylan also finds out that his entire bank account is cleaned out by Kevin and Suzanne's scam, but alienated with life and embarrassed and ashamed at himself for what happened, Dylan keeps his financial problem to himself. Meanwhile, Brandon decides to tell Dylan about him and Kelly, but chickens out after seeing him drinking again. Later, at a banquet for Donna's, Dylan crashes the party and creates an ugly scene after being inadvertently tipped off by Nat about Brandon and Kelly. Dylan then goes to a nightclub where Jesse is bar-tending and tries to get a drink, but Jesse turns him away, and Dylan also picks up a prostitute at the bar. When Kelly comes over to Dylan's out to talk to him, she finds him with the scantly clad prostitute. When Donna's mother criticizes her behavior by accepting a dance with D'Shawn, she decides to face up to Felice and stay in Beverly Hills. The university's day-care program leaves Andrea wanting to spend more time with her baby. Also, Brandon is reunited with Josh Richland who offers him a chance to run with him for campus office.

Brandon runs for vice president alongside Josh and does great when he steps in and gives a speech in Josh's place. Their campaign is threatened, however, when Alex Diaz - their opponent's campaign manager - uncovers the unpublished article that Josh wrote about Brandon the previous year, detailing Brandon's tutoring of D'Shawn and alleging that Brandon took tests for D'Shawn. Donna asks Clare (now attending C.U. as a sophomore) to move into the beach apartment in David's place, but Clare brings a bad snoring habit with her. Meanwhile, Valerie secretly decides to pursue Dylan after finding Brenda's mementos of him in the Walsh's garage, and hides her connection to the Walshes from him.