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 too during the summer. Then autumn came and the Scott family left. Which meant Gus had nothing to do but sit around. One day, during a walk, he met Mouse, who was cold and hungry. "Come spend the winter at my house!" cried Gus. Thus begins an unlikely but heartwarming friendship.