The Fonz makes an appearance on popular dance show "National Sock Hop" to accuse host Skip Oliver of stealing Leather Tuscadero's new song," Moonlight Love", from her audition tape and giving it to not-so-hot rockers, Freddie and the Red Hots, to jump-start the band's stalled career.
Richie gets a call from Fonzie to see him at his garage. When Richie arrives he finds Fonzie finishing up repairs on a hearse - in whose casket is contained thousands of dollars in counterfeit money. Fonzie recognizes the funeral home that owns the hearse is a front for illegal movement of counterfeit money, and Richie tells him to call the police. Fonzie, however, decides that to avoid suspicion from the funeral home he'll return the hearse as if nothing is wrong. Later that day, however, when Fonzie is not seen anywhere, Richie grows concerned, and he takes Postie ...
Richie's band hunts for a piano player, Howard and Marion practice their bridge signals, and Fonzi plans a sting on the shyster who duped Chachi into selling a miracle wax that soon destroys what it shines.
Fonzie promises the good Father Delvecchio (Al's twin brother) that he'll go one day without fighting. This, when a former rival, Rico, shows up in town with his merchant seamen crew and a mystery woman named Kat Mandu.
After Howard loses his temper and blasts her for forgetting to set the emergency brake and wrecking the car, Marion Cunningham opts for jail-time instead of a traffic fine to prove to her husband that she can be responsible for her actions.
Embarrassed when girlfriend Lori Beth makes him wear a silly Humpty Dumpty costume for the Homecoming Parade, unhappy Richie Cunningham storms off to a bar for a root beer and is swept off his feet by a sophisticated freelance photographer he meets there, beautiful Barbara Thomas.