Barney becomes convinced the Mayberry bank is ripe for a robbery and tries to prove his point by staging a fake one. When he discovers a weak spot in the security system, he unknowing relays this information to a couple of actual robbers.

Opie's new friend Arnold is a spoiled brat used to getting his own way. He convinces Opie to try and get a raise in his allowance by throwing a temper tantrum, showing Andy that he must teach Arnold's father the importance of discipline before Opie picks up any more of Arnold's spoiled habits.

Aunt Bee becomes depressed about her age and falls for the charms of Colonel Harvey, a traveling medicine man selling a magic elixir to restore her youth. By the time Andy and Barney discover the secret behind the elixir, they find he has gotten the entire Ladies Aid Church Committee under his spell!