The first hour-long "Sesame Street" TV special that aired on HBO. When Elmo goes to bed on Christmas Eve he asks his father why kids leave cookies out for Santa Claus. His father then weaves a tale of a 19th Century Sesame Street which is marked by so much unkindness and lack of holiday spirit that Santa Claus would never dare come for a visit. Until Elmo's great-great-great grandmonster comes in and tried to teach the street all about the holiday spirit.