Ralph Case is a police investigator. After Barney receives a notice in the mail that a state police inspector will conduct a routine inspection in Mayberry, Barney immediately proceeds to get the jail in apple pie order. However, Andy doesn't feel the same urgency since the state inspector is an old friend and fishing buddy of his and that the inspection itself is usually nothing more than a formality. However, trouble begins when the inspector shows up and it's not Andy's friend at all, but a new, harsh, examiner.