 When Brian suffers a massive nosebleed and collapses, he is rushed to the hospital and Dr. Hartman reveals that Brian has a benign brain tumor, which has caused the decline in his intelligence.The family members are split on whether Brian should have the surgery to remove it, with Stewie wanting Brian to return to his old self and Brian enjoying his newfound life of enjoyable stupidity.Stewie uses the lure of a fake Kenny Chesney concert to take Brian to "cultured" activities like the opera, yoga, and an upscale restaurant instead.