The three original entrances to Diamond had been created by Force, when the company set up its first Hydroelectric power plant. At that time they had used several existing entrances to underground waterfalls, but that was centuries ago. Over time the Force company had grown and now dominated earth. Force had gone on to create a vast network of mines linked by canals and supported by closed underground towns. Force had developed an subterranean world that mirrored the surface of twenty second century earth. With out the telepathic link to Issy there would be no hope of ever finding her. But find Issy she must before Force sent Issy to work at the volcanic heat pump plant. For the link between Storm and Issy was more than telepathic, it was total. What one felt the other experienced. The Force organisation had grown strong over the centuries using these genetically developed link. Now Force had created a new form of psychic power, and now wanted rid of thinking compassionate individuals like Storm and Issy.