Prometheus, father of all Cybrids, instigator of the first two Earthsieges, is still out there somewhere. The Dark Intellect has learned, and it is hiding in the outer edges of the Solar System, learning, observing, and waiting for the perfect moment to strike. Meanwhile, the Human Empire is tearing itself apart. The decree by Emperor Petresun, the original creator of Prometheus, to defend Earth first, while practical, does not sit well with the colonists of other planets, who remember how helpless they were during the previous Earthsieges, and how Earth never sent any help until it was too late. When the brutal crackdown began, the Martian Resistance has formed. Prometheus found his chance to strike when the Emperor ordered his Imperial Knights to attack the Martian Resistance, and the Starsiege has begun...