When she decides that the articles in the latest issue of the Third Grade Gazette are not interesting enough, Nancy sets out to find some news worth reporting on.

When Emma finds an old note in a lost library book, she knows she has her next case. But when the clues lead to an off-limits tower in a New York City library, she has to learn an extra-special reporter trick: how to go undercover! Will Emma save the day, or get herself and her friends in big trouble?