New student Emily Valentine arrives at West Beverly and makes a big splash with the guys, especially Brandon and Dylan. The girls don't exactly take well to the interloper, especially jealous Brenda, who realizes she might want Dylan back after all. Meanwhile, Scott returns from Oklahoma and finds that his friendship with newly popular David has considerably cooled.

Dylan's mother, Iris, makes a surprise visit to Beverly Hills, hoping to start fresh with her estranged son. Cindy hits it off with his free-spirited mother, but the strain of his mother's reappearance drives Dylan back to the bottle. Donna and Steve experiment with the stock market, and Donna turns out to have a surprising knack for picking successful stocks.