In the action-packed conclusion to The Shield, the Twelve Cities have been sacked, the Circle destroyed, their peaceful ideals turned to ashes in the face of alien violence. The Earth has been infested with a race of invaders intent on gutting the planet of its mineral resources. Minesites dot the surface, employing human slaves to do the work when they're not being hunted for sport. Only William Grayson, the last Shield, can lead the few remnants of his people against this scourge as they fight overwhelming odds to prevent genocide and reclaim their home. From the mountainous crags of Tibet...