There was once a friendly ghost, by the name of Gus, who lived in an old house in the country. Mr. and Mrs. Scott and their twins, Susie and Sammy, lived there
Gus and Mouse have moved into the Historical Museum, living there with Mr. Frizzle and Cora the cat. Late one night, Cora came in from a moonlit walk and said,
Gus, the friendly little ghost, is in danger of losing his home when the owners decide to have the old house demolished, but events take a different turn.