When Stanley's fire safety poster wins a contest, he gets to visit a firehouse, where he climbs onto a real fire truck, slides down the fire pole, and helps out in a real emergency.
Flat Stanley finds him trying out for the baseball team and outwitting the best players until the fairness of his "flat-vantage" is called into question.
Arthur is excited by a party in a haunted house, and Stanley wants to show off his limbo moves. But when they see a bully picking on their friend at the party, the boys know they have to help. Soon Stanley comes up with a plan that is flat-out hilarious.