It is the year 2031, as the spores of the Flower of Life spread over the remains of the SDF-1 and SDF-2, the Invid land out of Hyperspace, on a head-on collision with the Earth. They crash on the spot, quickly turning it into their massive hive, later to be called Reflex Point. In a matter of moments, the Invid take control of the devastated planet.

瑞克·卡特率领的远征军在宇宙深处取得节节胜利，并和反抗因维人的外星人结成“哨兵同盟”。但就在2031年，地球为瑞吉斯所率领的因维人占领。2044年，远征军调转方向，开始朝着人类古老的家园——地球挺进。借助哨兵同盟成员海顿星人帮助，爱德华兹将军将舰队全部配备暗影技术，它可使舰队不被因维人的探查设备所发现。此外，远征军还依靠海顿星人开发出更为强劲的中子S导弹。为了将因维人赶出地球，不惜牺牲半个星球为代价。 在此期间，SDF-3神秘失踪，瑞克也发现中子S导弹的奇怪之处。他告诫远征军不要使用这个致命的武器。但远征军已向因维人发起最后的攻击……

Following her rape, Jennifer Hills wrote a bestselling account of her ordeal and of the controversial trial in which she was accused of taking the law into her own hands and brutally killing her assailants. In the small town where the rape and revenge took place, the relatives of the rapists she killed are furious that the court declared her not guilty and resolve to take justice into their own hands.