In the twisted jungles of Paradiso, humanity fights for its survival. The fierce, alien warriors of the Combined Army have poured through the Acheron Gate, descending upon the emerald jungles of the newest colonial world in a seemingly unstoppable torrent. The bestial Morat pound the Paradiso front, where brave men and women fight ceaselessly to maintain a defensive line which the sly Shasvastii penetrate with devastating ease. In the star-swept skies above, the collected might of humanity's armadas maintain a life-or-death blockade to cut off an endless horde of alien reinforcements. And if any of humanity's fractious forces falter, then all may be lost...