Judy is tricked into doing more group activities than she planned when she tries to improve her relationship with her mother-in-law against Bill's advice. Judy is thrilled when Louise invites her on a cruise only to discover, to Bill's delight, that her sneaky mother-in-law has duped her. Now, Judy finds herself traveling with Louise's women's group, The Red Hat Society, which consists of women aged 50 and above. Judy must somehow find a way to let Louise down without hurting her feelings.