Few space colonists dared venture back to an Earth that most believed uninhabitable. For its own ends, the EarthWatch authorities forbade and enforced a no-return policy with orbiting sentinels that ringed the planet and were capable of vaporizing any transgressor. Only Chia Swann would brave a secretive mission to a world thrown back to the Stone Age — where the lucid glance of one human inhabitant would tell her all she needed to know: humankind had survived the holocaust. Planet Earth could still sustain life amid the dangers and devastation. And Chia was determined to enlighten and aide what survivors she could despite the lethal and totalitarian eye of EarthWatch.