Aunt Eloise invites Nancy, Bess, and George to New York to help a friend who has been swindled out of a sizable sum of money. There, the girls see a performance of a magicians group who stun their audiences with clever sleight-of-hand tricks. Because the magicians temporarily remove peoples wallets and handbags, Nancy feels the actors arent above suspicion. Her hunch is borne out and a whirlwind chase ensues.