Stolen

Kelli Paramar attends a charity auction at a haunted theater and is anxious to use her paranormal powers to talk to the mysterious black diamond to find out if it can shed light on her own powers, but after the auction the diamond is stolen from the art museum; at first Kelli suspects the strange man she noticed among the bidders, a man that apparently nobody else saw--but the other artifacts inform her that the man is Sturgeon Rackham who disappeared in 1900, and that the thief was a woman, who may be planning to use the diamond's aura against people like Kelli.