Buster friends are getting tired of his unclean habits --- he plays hide-and-seek in trash cans, eats food that's been on the ground and doesn't always wash his hands. They've decided he needs to clean up, or they're not coming to his pool party. When they teach him about germs, however, he begins to fear them everywhere. Now, he's afraid to touch anything and is seeing swarms of imaginary germs wherever he goes.