A young apprentice, an alien academic, a caretaker for the dead, an archivist, and others wrestle with profound questions after their evacuation ship, carrying the last humans on Earth, finally reaches its destination.

Hundreds of years ago, the last humans on Earth boarded the Exodus Fleet in search of a new home among the stars. After centuries spent wandering empty space, their descendants were eventually accepted by the well-established species that govern the Milky Way.