The hideous and genocidal Karaak are closing in on survivors at the Lilacron colony, and once it falls, Earth will be the next target.
Will Ryder and his small crew are the only ones who can save them. Doing so will mean finding the one world that was able to resist the Karaak and convincing their leaders to share the secret of their success, but that world paid a heavy price for driving back the Karaak and their willingness to help others will come at an equally high price. Time is running out, tensions are running high, and death stalks the stars.