Book excerpt: With the sometimes reluctant help of her friend Louise Sidell, Penny Parker discovers the secret behind Melvin Osandra's seance establishment and, in turn, helps her friend Nellie Marble out of her difficulties with her doll shop. Additionally, Penny is able to free actress Helene Harmon from the plague of the witch doll that will not disappear. In the end, Penny's father allows her to write up the story for his newspaper.