Nancy Drew's search for a flight of 99 steps to solve the mystery of a friend's weird dream takes her to France. But before she leaves the United States, an unknown person calling himself Monsieur Neuf warns the young sleuth not to pursue her mission. With her friends Bess and George, Nancy arrives in Paris to join her father who is working on another case: to find out what, or who, is frightening wealthy financier Monsieur Leblanc into selling large...