Fearing that she might be Kerner's next target, Indy travels to New York City to warn her and to find out more about the mysterious statue.[11] There, he interrupts her lecture on the culture and downfall of Atlantis,[12] and the two return to Sophia's apartment. They discover that Kerner ransacked her office in search of Atlantean artifacts, but Sophia says that she keeps her most valuable item, her necklace, with her.[13] She owns another of the shiny beads, now identified as the mystical metal orichalcum, and places it in the medallion's mouth, invoking the spirit of the Atlantean king Nur-Ab-Sal.[14] She explains that a Nazi scientist, Dr. Hans Ubermann, is searching for the power of Atlantis to use it as an energy source for warfare.[15]