A vision drawn from the mind of a dying member of an Outrider clan draws Shai and Lorne back into the city of Nhil-Rhar, where they are pulled into a deadly conspiracy. Pathfinders are having dreams of destruction and chaos, criminal factions are battling openly in the streets, and a mysterious virus has been unleashed in the Agency's computers. On the fringes of it all lurks a dark figure that Shai can sense but not see, a figure that is neither pathfinder nor guide yet somehow—impossibly—more powerful than both. Time is running out, and if he doesn't solve the mystery of the Ouroboros Prophecy, not only his life but the lives of the Outriders and everyone in Nhil-Rhar will be forfeit.