Robbie is heading for an "F" in world literature until the teacher assigns a beautiful blonde newcomer as his study partner. He is attracted to her right away but soon discovers that her looks don't even compensate for her loss of mind.

Steve and Bub are both called out of town and Mike urges them to leave him in charge, only to find the role of mother hen harder than it looks. His worth is really put to the test when he learns that Robbie and Hank have been taken to hospital after an accident at school.