Nancy and her two best friends George and Bess, are so excited! They have been invited to Deirdre's sleepover party! There will be pizza,cake, and even a pagama fashion show. But the most exciting thing is that the party has a city girls doll theme. All of the guests are bringing their dolls with them! But then Deirdre's city girls doll -Hollywood Heather- goes missing. Is her sleep over ruined? Or there a detective in the room who can make sense of this mystery?