Cindy and Jim throw a party for their 20th wedding anniversary. As Stuart and Brenda's affair grows, he proposes marriage and she willingly accepts. Meanwhile, Brandon falls for an anthropologist grad student named Lucinda Nicholson. A paranoid Dylan buys a gun from a street dealer and almost shoots Brandon. Andrea tells Kelly that she has doubts about her affair with Dan after he tells her about his non-belief in marriage. Then, Andrea meets a charming, Latino barman at the party, named Jessie Vasquez. Mel asks David to look after baby Erin while he heads off to Mexico with his girlfriend.