Messy monster can't find his caterpillar friends. The garden bush where he left his friends is now covered with pretty butterflies. But where did the caterpillars go? He flutters off to OKIDO to find out.

Messy, a monster, explores science questions that children ask about the world around us. Messy monster is just about to take a bite out of his delicious green sock for breakfast, but before he can it gets blown away! He goes to OKIDO to find out why the wind is so blowy.