The end of an era approaches as the 90210 gang makes major life decisions. Relationships come to an end, age-old romances bloom, and the wedding of a much-loved couple is celebrated among friends, family, and fans alike. Old friends make fresh appearances as the gang prepares to say goodbye to the show that truly defined a generation.

David expresses his feelings for Donna by writing her a giant love note in the sand. He is understanding about her reluctance to accept his proposal. He believes that she is having trouble reconciling her dreams of the perfect marriage with reality. A talk with Janet prompts Donna to realize that her expectations have been unreasonable. She tells David that she loves him and wants to spend the rest of her life with him. Dylan graduates from California University. Matt considers moving to New York to help her sister-in-law raise his child (for whom he was the surrogate father). He declares that he will stay in Los Angeles for Kelly. Kelly, unable to fight her feelings for Dylan, calls off the engagement. Matt assumes that Dylan told her about his indiscretion in the desert. Kelly lashes out at Dylan for failing to disclose this information. Janet is distressed to learn that she must compete for the editorship of Nouveau, which Yoffe had led her to believe was already hers. She feels left out as Steve strenghtens his bond with Maddy. Ellen asks Noah for a commitment in order to protect Caitlin from potential heartache. He declines because the relationship is moving too quickly for him.

Camille returns home from vacation carrying hopes of a reconciliation with David. After David breaks the news of his reunion with Donna, Donna offers to buy out Camille’s share of their partnership. Although she is devastated by the news, Camille insists that she can handle working with Donna at the store. A drunken and blubbering Camille ruins David and Donna’s plans by showing up at his house. Camille agrees that it would be best for her to leave the store, and she and Donna wish each other well. Donna fears that David is no longer attracted to her; she believes that he loves her like a sister. David shows Donna an old yearbook message where he had shared his desire to marry her one day. He stuns her with a marriage proposal. Donna asks for time to think things over. Kelly panics after a radio report announces a surfing fatality in an area where Dylan had planned to surf that day. She tries desperately to contact him for hours, and winds up going to the morgue (with Matt in tow). Dylan finally returns one of Kelly’s messages, as he had actually hopped a train to northern California. Kelly’s strong reaction to the possibility of losing Dylan forces her to realize that she still loves him. However, they do not believe they can find a way to make their relationship work. Matt learns that his brother has died in an auto accident, leaving behind a pregnant wife. Kelly decides to accompany Matt to New York for the funeral, and promises to stand by him. Janet receives an offer to write for a new magazine. Steve, dismayed by the lack of time Janet is spending with her family, wishes to call off the sale of the Beat and return to their previous working arrangement. Noah moves out of David’s house because he finds it painful to see David and Donna together. Ellen becomes unnerved after overhearing Noah discuss his feelings for Donna with the A.A. group. Ellen soon develops self-confidence and elects to pursue a romance with Noah.

Donna is upset by her mother’s decision to sell the house. David hangs out with her at the apartment, and they both fall asleep on the couch. Donna pulls away from a kiss because she doesn’t want to risk their friendship by becoming romantically involved. Felice and the gang grant Donna’s wish for one final Christmas at the house. Steve, Janet and Felice set up an unwitting Donna and David on a date. They finally decide to get back together, and share a passionate kiss. Kelly and Matt set an August wedding date. Dylan infuriates Kelly with his wedding gift, a trip around the world for two. Matt considers a job offer in Seattle, and Kelly agrees to go with him. Although he fails to get the job, Matt suggests that they move anyway. Dylan unsuccessfully pleads with Kelly for another chance at their relationship. A man offers to purchase The Beat for $750,000. Janet would continue to work at the paper, while Steve would stay home with Maddy. They decide to give this arrangement a trial run. Steve initially feels emasculated, but comes to enjoy spending time with his daughter. Janet fears that she is missing out on the major events in Maddy’s life. Noah helps convince Ellen’s mother to let her spend time with her daughter, Caitlin. Ellen tells Noah that she doesn’t have time to date him, as she must concentrate on being a good mother.

Mitch annoys Donna by trying to plan their entire relationship via an electronic organizer. She suggests that they stop seeing each other outside of the business setting. Mitch responds by freezing her web site until she agrees to another date. Donna tells him off and makes it clear that she will not change her mind. Mitch opens the site, which quickly becomes a major success. David objects when Camille is asked to model for the web site. He admits to Donna that he is purposely trying to sabotage his romance with Camille. David finally breaks up with Camille, telling her that they simply weren’t meant to be together. Janet nixes Steve’s plans to invest in Donna’s site because of their limited finances. Steve infuriates her by investing money left to him by his grandfather. Janet didn’t know the account existed, and thinks that Steve kept it as a safety net so that he could leave her. Steve explains that he fears he won’t be able to properly support his family; he used the account as insurance against his screw-ups. A man that Matt met during his desert weekend approaches him for legal services. Kelly hears him mention Amy, so Matt covers by claiming that Dylan slept with the woman. Noah bails Ellen out of jail after she is found drinking in her car. He convinces her to return to A.A. Ellen reveals that she has a six-year-old daughter, who lives with her grandmother because Ellen can’t take care of her.

Kelly grows suspicious of Matt’s distant behavior. She seeks answers from Dylan, who denies that anything unusual happened during their dirt biking weekend. Matt admits to drinking spiked punch. After witnessing Kelly’s indignant reaction, he decides not to tell her about his one-night stand. Kelly insists that Matt is still hiding something from her. She later apologizes for failing to trust him. Camille tries to convince Donna to sell her clothing online. Although Donna doesn’t support the idea, Camille seeks out Dylan as an investor. Even after Donna agrees to the proposal, David fumes at Camille for going behind her back. He also expresses discontent at the amount of time she is spending with Dylan. Donna agrees to a date with the web page designer. Steve and Janet fear that her parents’ dog is to blame for the death of their snooty neighbors’ pet rabbit. Steve concocts a scheme to keep the couple from discovering the truth. Ellen objects to Noah’s efforts to help her establish a normal life. Donna reminds Noah that he cannot single-handedly save Ellen.

Dylan and Matt go dirt biking for the weekend. They find that their campground is the site of a rave. Matt unwittingly drinks fruit juice that contains liquid acid. He gets very wild and winds up sleeping with one of the partygoers. Dylan advises him to keep the encounter a secret. A lonely Donna grows more jealous of David’s relationship with Camille. She accidentally walks in on them having sex on the floor of the store. She freaks out and starts disinfecting everything in sight. Camille suspects that Donna wants David back. David tries to broach the subject with Donna; they reminisce, but do not disclose their feelings. Noah recognizes a bar customer as a woman from his A.A. group. He stops her from drinking, and they quickly make a connection. She feels threatened by Donna until Noah helps her obtain a full-time job. Kelly recommends Maddy for a sausage commercial. Janet neglects her work and becomes caught up in the idea of being a show biz parent. A change in the campaign causes Steve to replace Maddy as the focal point of the spots. He quickly lets the success go to his head.