Within a centuries-old tapestry on display in the palatial French estate of Lawrence Vanderbilt is a map to one of the greatest treasures of all time—the sword of Joan of Arc.But when Professor Fathom's men wind up captive in Vanderbilt's dungeons, there's only one person who can come to their rescue—the Professor's caring yet cantankerous German housekeeper Elsa. Now Elsa will have to use all her wits and feminine wiles to navigate her way through the secret passageways of Notre Dame Cathedral if she is to save the Fathom's Five team.