The Galaxy is ruled by a single Empire—but the Imperial Throne is empty. The machine races demand a turn at the job, but the organics refuse to allow it. For more than a century, the Galactics have battled for supreme power. War and instability reign in place of peace, with every species spread over a hundred billion stars suffering as the Empire decays. James McGill discovers a scheme is underway. A new power is rising, determined to snatch the Throne from all the rest. Will this unite the Galactic Empire, or destroy it utterly?