The Tibetan word 'Agharti' means "The subterranean kingdom at the this earths center where the king of the worlds reign". The story begins as your plane crashes near northpole. There's strange opening which leads to the underworld... So you're on the right way, looking for lost scientist northpole expedition which disappeared mysteriuosly some time ago. "Where were we, what was this place and how the hell would we be able to get out of here, not to mention saving this old professor type if he was still alive?"