A daring and delightful crossover of Sherlock Holmes and his criminal adversity: Arsène Lupin, the Gentleman Burglar. These superb sleuths will solve intricate riddles and journey across France and beyond to uncover the long-lost treasure of the House of Bourbon. Sherlock Holmes and his cousin, Vernier, have been hired by the Baron of Creuse to find the lost treasure of King Louis XIV. The location of which has been lost for generations.
Trekking from La Belle Époque Paris to deepest rural France, Holmes and Vernier must employ all their wits to solve the fiendishly difficult puzzle of the Needle of Creuse. After deciphering the mysterious meaning of the phrase "
st. s. 138", Holmes and Vernier realize that not all is as it seems and are led along a long-buried path to an ancient secret.
But other forces are at work, and jealous hands seek to interfere with Holmes's work. They must team up with the notorious gentleman burglar, Arsène Lupin, if they want any chance to find the treasure and avert international disaster.