Mat Kacau (pronounced as mud.ka.chow) tells a story of a prankster named Mat Kacau who roams the city looking to spread happiness to every kid in town. He believes the world would be a happier place if everybody laughs more than usual. For him, if the prank is ten times bigger, then it is ten times more fun! Unfortunately his over-the-top actions annoy the kids rather than entertaining them. So the kids return the favor by serving his prank back to him and giving Mat Kacau his just dessert in the end.