The Cursed Stone [La Pierre Maudite]

Hello agents,
Jacques Soubise is one of our valued customers. An occultist and antiques enthusiast, he has been offering for several years a service of expertise for old objects, from his office located on rue Tripière, in Toulouse. He has been working for a very long time on what he calls “the quest for his life,” but treasures all this secret.
His research, at the same time as his concern grew, he signed a contract with our agency. The single clause of this contract has just been activated. You, the intervention team, you go to his office, Soubise having not given news for 7 days.
I need you,
Agent T.