Mayflower II

The sixth millennium: An alien occupation of Earth has been thrown off. Now a ferocious new government called the Coalition is sweeping through the solar system, seeking out those who collaborated with the hated enemy. A handful of immortals, once collaborators, live on an ice moon called Port Sol, far from the sun. They govern a community of thousands of short-lived adherents. The Coalition's grasp will soon reach this remote place. The immortals must flee the solar system on vast starships - but they can take with them only a few of their followers