The electric storm took two weeks to encircle earth. Only children and the elderly survived its wrath. And so it was that the children and grandparents of the world realised they had to look after themselves, alone. Anna joins Tommy on an adventure that takes them a great deal further than they could ever have imagined, deep into the bowels of the earth, away from the reach of the devastating storm above, but into the mystery and danger that lies in wait below. Anna tells her story as the conundrum unfolds: "My torch had gone out but the image stayed, seemingly right in front of me as I stood transfixed in the cave. I could hear Tommy calling my name but I couldn't shout back. I could do nothing. I felt rigid and totally helpless. It pulled and I followed. I had no choice."