In solving a series of mysteries, Nancy Drew and her Detective Club study techniques of criminal investigation involving handwriting, fingerprints, codes, and moulages.
A search for stolen jewelry takes Nancy to New Orleans where she uncovers a swindling racket in which a medium uses her trade to relieve victims of their valuables.
Nancy tries to prove that the class pet Bun is not the one wrecking the class's Spring Fair projects. Nancy's friends are sad because the class hamster has gone missing. Poor Nibbles. But then Katie brings in a bunny named Bun Franklin to be the new class pet! Everyone is thrilled, and now they can began preparing for the Spring Fair. But soon enough somone starts wrecking the class's Spring Fair projects, and everyone thinks it must be Bun Franklin! Mrs. Reynolds is afraid he can't stay. But Nancy is sure it's not Bun -- how can she prove it? It takes a lot of clue hunting and sleuthing for Nancy to realize that what she's uncovered just may solve two mysteries at once!.
As the class performance of "Alice in Wonderland" approaches, Nancy reluctantly partners up with the irritating Orson Wong in a search for his "magic" hat, which he needs in order to remember his lines.
