Before the French Revolutionaries executed queen Marie Antoinette, she entrusted some of her 'crown jewel' diamonds to stable-hand and lover Laurent Halezan. The cocky incompetent juvenile heir to his wine estate, Jerome, is selling off all possessions. Louvre professor Dupuys guesses that trail and engages old friend Sydney to embark near Paris on a relic hunt with Nigel, lading there. They find he's being robbed by the delivery maid and extorted by a loan-shark Paris gangster, who gets and auctions the wine bottle form the revolution years suspected to contain the treasure, but that proves an outdated trail.
—KGF Vissers