Fonz and Roger are going to a teacher's convention in another city but miss their flight. They hire Potsie's uncle to fly them in his old crop dusting plane, which could lead to high flying disaster.

Babysitter Fonzie makes a grave mistake when he listens to championship boxing on the radio during little Heather's tea-party; Joanie has more on her mind than Marion's mothering when she and Chachi head to the comfort of the Cunninghams after she catches the Canadian flu while on tour with the band.