With Nat still in the hospital awaiting heart surgery, Brandon temporarily takes over running the Peach Pit, while Dylan rescues the place after he buys out Joey's share, making Dylan the co-owner. Meanwhile, David's drug problem returns, resulting in Kelly and Donna moving out and David losing his radio DJ job when Howard the station manager sees that he's completely out of control and fires him. Jesse objects to Andrea's decision to get an abortion. Brandon learns of Lucinda's divorce from Professor Randall and wants a relationship with her.

Donna tries to make up with David, whose increased drug use turns her away. David also steals $150 from his father to buy more amphetamines for himself. When his drug dealer is arrested later, he finds himself in possession of a huge stash of narcotics and calls on Dylan for help. Meanwhile, Jesse and Andrea meet with her grandmother to get her blessings before their wedding and reception at the Peach Pit. A dangerous affair begins between Brandon and Lucinda, who shows her true colors when she starts teaching her anthropology class of human sexuality and preaches the need for multiple partners, seeing sex as her personal weapon. Brenda gets a surprise visit from a long-absent Stuart on Valentine's Day.

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.

When Brenda and Kelly are called back to final auditions, the resulting competition puts a serious strain on their friendship. Steve continues to coach Laura for the lead, and she ends up making a superior performance, brushing aside Brenda. Meanwhile, Brandon is still being perused by Clare who has a crush on him. So, she tricks Brandon into taking her out to her senior prom at her posh boarding school which leads to Brandon getting decked by an angry passerby at Clare's hotel post-prom party. Also, Jesse's not around when Andrea has a medical emergency and she's forced to call on Donna for help to take her to the hospital. Elsewhere, Kevin continues to charm his way into Dylan and Suzanne's life which makes Kelly feel left out.