VIOLENTLY, THEY ACQUIRED HUMAN BODIES... WARILY THEY EMERGED FROM THE WATER ONTO THE ALIEN LAND. Male and female. Positive and negative. With hands linked, they formed a deadly weapon capable of delivering a lethal high-voltage, shock to anyone, anything they touched. Fear made them hostile, dangerous. Recognizing himself in them, fascinated by the lovely Lioa, Mark Harris was irresistibly drawn into their charged current. They alone could tell him where he had come from, who he was. But he had not reckoned on the forces that would compel him, calling him to complete a desperate alien mission, threatening the fragile new bond he had forged with the Earth... with men.