All the woodland creatures of Happy Forest (where even trees and flowers smile) go to Fluff Nugget, a fluffy, round critter of indeterminate species, when they need cheering up--he just sings them the 'Goodbye Grumpy Grumps' song, and they feel happy again! But when this happens too much...like, WAY too much...it starts to wear on Fluff Nugget, until he feels grumpier than anyone. After he lets loose a cry of 'I AM NOT OK!' Fluff Nugget and his woodland friends must figure out a better way to boost the mood. Will the Happy Forest ever be the same again?