Fonzie begins restoring a wrecked 1955 Chevrolet convertible, unaware it comes with more than just broken seats, a broken engine and a rusted shell. It comes with a beautiful young woman, to whom there's more than meets the eye.

Joanie says "yes" when Chachi pops the question and Fonzie finds that being single is a major snag when he decides to adopt Danny, his little brother from the Big Brother program.