Simmering tensions boil over as the Ragnosians attack the colony world of Alios, beginning a war with Leyria. Jack, Anna and Melissa must defend a planet full of civilians from a hostile invasion force. Meanwhile, Slade's origins are revealed, as he hatches his plan to assassinate the Prime Council. A plan that will irrevocably change the political landscape of many worlds. The Overseers will soon move their final pieces into position, and the galaxy will never be the same again.