In their never-ending quest to wipe out the Devine and gain ground, the Khai-mah finally arrive to take the Earth by force. Only Zero, Joan, Wraith and the Numbers stand in their way. Development of new craft and weaponry continues which will give humanity a fighting chance. With Joan appointed as human ambassador, she stubbornly refuses to shield Humanity from the Khai-mah threat. Bonds of unity form all over the planet ... Now is not the time for petty squabbles.

Nothing ever runs smoothly, and as Khai incursions grow more frequent and vicious, Zero makes a dark realisation. With parts of the planet turned into molten wasteland, Wraith attempts to convince Joan to take the ultimate risk and extend the hand of friendship. This sends a ripple of discord through the hive.Halting any further advance, the forces of Earth stand toe to claw with the marauding Khai.

All the while trouble looms as the Khai Object continues its steady approach. But something else is coming ... Something equally deadly, and from much closer to home ...