Polly, the new girl in town, is lively and fun-loving while Jillian, on the quiet side, is just the opposite, but they may become friends—even best friends.

Peanut and Jilly, the most competitive girls in their class, think that they cannot stand each other, until their teacher assigns them the task of studying and writing reports about each other.

Peanut and Jilly throw a haunted house party for Jilly's birthday, and the celebration becomes more mysterious when uninvited guests are discovered hiding in the cellar

Miss Kraft loves the play that Jilly and Peanut have written and now she wants them to put it on for the whole school, but Jilly wants nothing to do with footlights and fame

Peanut knows she and Jelly can handle baby-sitting for the neighborhood twins until their real baby-sitter can watch them. But when a snowstorm hits Evanston and the baby-sitter can't get there, Peanut discovers what it is really like to be in charge.