Wayne, Diane, and Amy are accidentally shrunk to near-microscopic size. Soon after, Grandpa Murdock (Eugene Roche) drops by to pick up Nick for a fishing trip. Nick feigns illness to avoid going with him. He then leaves, but not before inadvertently swallowing his shrunken relatives, van and all. Nick interprets Wayne's help message in the newspaper and realizing what has happened, he rushes to his family's aid.