Six years have passed since the events depicted in the first episode. Humanity is now thrown into a bloody civil war fought on one side by the central government of the Terran Orbitals and the self-appointed Human-Alien Alliance; a new organization with a mysterious origin and agenda. Kal Wardin left active service in N.O.V.A. years ago and now lives among the colonists of the desert planet Scorpius. But war never spares even the most peaceful places.