Lisa composes a charming little ditty that soon finds itself in the ears and on the lips of everyone in town, turning Springfield into the kindest, gentlest, and happiest place on Earth. However, when peace on Earth and goodwill towards all men becomes a genuine reality… things begin to fall apart, and Springfield soon finds itself on the brink of destruction!
- Chapter 1: The D'Oh Wah Ditty
- Chapter 2: Play It Forward
- Chapter 3: Otto Immune System