Cave Carson was once the world's greatest underground adventurer, but that was a long time ago. When he settled down with his wife, Eileen, to raise their daughter, Chloe, he traded the controls of his vehicle, the Mighty Mole Mark 1, for a desk and keyboard. Since then he has led a quiet life, even with the distraction of his otherworldly cybernetic eye. But when a sudden illness claims Eileen's life, Cave's tranquil existence is shattered--and he...