When a hurricane hits Springfield, the only house that gets severely damaged is the Flanders'. The Leftorium is also looted, and with no insurance they are forced to live in the church. Feeling bad, all of the citizens join in to rebuild they're house. The Flanders are overjoyed, but when Ned looks more closely, he sees that it is a result of poor workmanship.
Ned goes crazy at all the townspeople, then drives off and checks himself in to a mental institution. Dr. Foster, Ned's childhood therapist, treats him and discovers the key to Ned's breakdown was that he always suppresses his anger by saying nonsensical words such as "diddly". Dr. Foster uses Homer as a role model and helps Ned to express his anger against his parents. He is cured and returns home.