Richie, Potsie and Ralph need some spending money so advertise as odd-job men. They wind up getting a job fixing the fence on an attractive divorced woman.
Potsie and Ralph both fancy their chances with the woman, but (surprise surprise!) it is Richie who ends up getting close to her. After the average high-jinks in the first half of the story, things become bitter-sweet, as Richie and the woman get on really well as they share dinner together, but are split by the age difference.
A nice tale, and as much as I like the Fonz, it's nice to have these earlier episodes that revolve more purely around Richie occasionally.