“… she left her son the sum of four hundred million francs.” A tremendous amount of money is left in a will, but none of the heirs can be found. Friend to the deceased, Don Luis Perenna must track down the heirs, but it isn’t long before someone turns up dead and the investigation turns into a murder case. And where is master thief Arsène Lupin in all of this? Lupin is believed to be dead but are things what they seem? Explosive twists and turns await Don Luis in this novel from Maurice Leblanc.