Andy catches Opie trying to sell his broken bike to a friend and teaches him a lesson in honest dealing. But when Barney talks Andy into selling his house, the lesson comes to haunt him as Opie points out all the faults of the Taylor house to Barney's potential buyers.

Andy is horrified to find Goober has brought a car into the courthouse after being left in charge while Andy was away at a sheriff's conference. That's when he learns that a couple of law-enforcement friends from the conference are coming for a visit.

Barney's attempts at getting Otis to stop drinking through psychotherapy only succeed in driving him away to Mount Pilot. When Andy sees how bad Barney feels, he takes him up to Mount Pilot to convince Otis to come back, only to find that Otis prefers their jail over Andy's.

Frank, a teacher from Raleigh comes to Mayberry for a visit. He and Helen get along fine, and Andy suspects something is going on between them.

Howard proposes to Millie at the bakery where she works.

Andy catches the flu and Goober takes over as his deputy.

Sam brings over one of his Italian friends from the war--but unbenowst to him the friend brings over his elderly father and sister--and this creates mayhem in his family and business.