Mimi, Papa, and two of their grandchildren -- Christina and Grant -- fly to Paris aboard Papa's red and white airplane, The Mystery Girl. As soon as they land at Charles de Gaulle Airport and meet their pen pals, Jean-Luc and Marie, the mystery begins! A famous statue is missing from the world-famous Louvre Museum. A mysterious woman in black is following them. So is a pigeon, dropping clues and more along the way! The kids search the spooky catacombs, Notre Dame, and other Paris landmarks to try to solve the mystery. To make things worse, the Eiffel Tower is in danger of falling! Time is running out! Come along! Don't miss the fun, the frights, or the surprising ending!