When an exploration fleet in the rift between sections of the spiral arm are attacked by an unknown race, the dead Emperor’s clone-son, now on the throne, recognizes that the Empire is standing at the edge of an abyss and must find a way to not only win this new war against the alien aggressors but also overcome the inertia of the arrogant Space Force officers who are more ready to overthrow their Emperor than fight the war. Fans of military SF action will find it in this book.