After experiencing a few strange happenings, Richie begins to buy into the legend that the place where their Halloween party is to be held, the old Simpson house, is haunted.

Potsie saves Fonzie from a fire at the garage. Out of gratitude, Fonzie grants Potsie any one favor, and Potsie wants to pal around with the Fonz.

Fonzie has to have his tonsils removed and will miss a big Halloween party.

Joanie thinks Chachi is losing interest in her, and Chachi thinks Joanie isn't taking him seriously. On the advice of Lori Beth, Joanie invites Chachi over for dinner on a night where she is babysitting Potsie's cousins. Chachi tells Al that he's finally going to make his move with Joanie.