As the title suggests, this is a story about a bad mood and a stick. The bad mood (an emoji-like cloud character) moves from one character to another, travelling all around the world and causing unpredictable consequences. The stick is just a stick and does very little other than providing a home for a cocoon that gives birth to butterfly. The stick's final home in the window of the ice cream shop does, however, put the shop owner, Bert, in a good mood.