Reporter Alice Stone is visiting her old school, Carl Sandburg Elementary. She'll sit next to Nancy and become a third grader again. Then she'll write an article for her newspaper. But right away mysterious things start happening to Alice. First someone messes with her macaroni and cheese. Then her jump rope with the sparkly handles disappears.
Snooty Brenda Carlton is pushing Nancy to solve the case. She gave Alice the idea to write the story. Now the school's good name is at stake. If Nancy can't come up with a solution, it will be bad news for Carl Sandburg Elementary.