Richie is called upon for a favor by an old friend from summer camp (possibly older than he),who is now the member of a successful rock and roll band called "Fish and The Fins". While they're in town he wants to use Richie's home for the band because they can't rehearse with groupies surrounding their hotel. He has to keep it quiet though. Before this,Richie already told people he knows leader, Rocky Rhodes, and has guaranteed his friends free concert tickets. Which end up being in the "rafters" so Richie's rep. is on the line! Will Rocky be able to redeem Richard's ...

Richie Cunningham's case of mononucleosis endangers more than just his health after the Fonz finds out who gave Richie the "kissing disease".