Keedu and his army of dark mages have fled after their defeat at the hands of Bill Marshall in Sentinels of Far Sun. While most are content to find a quiet planet and stay out of the way, Keedu thirsts for revenge and is desperate to regain his honor, even though no force can stand before the Master of the Stones. On a small planet at the edge of the galaxy, Keedu encounters the most evil enigma of his home world, who is conveniently willing to help. Osphalon the demon fed on the life energy of Keedu's ancestors for millions of years and knows the Master of the Stones will eventually seek him out for his crimes. He convinces Keedu to walk backward in time and change the course of Earth's history in order to keep Bill Marshall from his destiny and secure Keedu as ruler of the galaxy.
All of humanity will suffer and billions will be enslaved, just to keep one man alive but safely away from the Stones. Will Keedu's plan succeed, or will Bill's family and the Stones be able to save us all?