On Christmas Eve, Elmo's father Louie tells his son about how Sesame Street was a dreary place in the 19th century as it's inhabitants lack the Christmas spirit enough for Santa Claus to not make a stop there and is enforced by a constable that is Mr. Johnson's ancestor. Elmo's great-great-great-grandfather of the same name has moved there as he works to get everyone into the Christmas spirit with the help of some Sesame Street inhabitants that support his motives