Clothing designer Mary Haines lives in a beautiful suburban Connecticut home with her wealthy financier husband Stephen and their 11-year-old daughter Molly. Her best friend since college, Sylvie Fowler, is the editor of a prominent fashion magazine that dictates the latest in taste and style for New York City fashionistas. When Sylvie learns from chatty manicurist Tanya that Stephen is having an affair with Crystal Allen, a perfume salesgirl in Saks Fifth Avenue, she confides in the ever-pregnant Edie Cohen but hesitates to tell Mary, who discovers the news from the same woman after getting a manicure herself. Despite her mother Catherine's exhortation to keep quiet about what she knows, Mary confronts Crystal first, in a lingerie store, and then Steven, before asking for a divorce.