When a rogue comet collides with the Earth, setting the entire planet afire, there are few survivors. Among them are a submarine crew, an underground sanctuary of scientists, and scattered individuals. Those who do survive, by forethought or chance, rise from the ashes, continue to procreate, and their descendants find new ways to live, create new cultures, new societies, new theologies. In addition, an alien spore has arrived with the comet, and...