Jack and Annie visit the Paris World's Fair of 1889 in an effort to protect four scientific pioneers from an evil sorcerer.

"Vincent, more than anyone, knows what it means to keep a secret. With his troupe of talented craftsmen--the only family he has--he designs hidden compartments for priceless treasures and passageways for undetectable escape routes. The rich and powerful who hire him pay handsomely for his work, and for his discretion--they know only his first name, and his business is strictly word-of-mouth. As Paris celebrates the 1889 World's Fair, the city fills...