From the publisher's website:
There is one place where all the races of the universe come together. They come as travelers, adventurers, pilgrims, merchants, raiders, and conquerors. They come alone, or with friends; in small groups, entire military campaigns, or even hordes of colonists to found cities and nations.
They come by accident or careful planning, driven by greed or glory or simple desire to be at the center of all things. By chance or purpose they decide the fates of kingdoms, peoples, worlds, ultimately even the entire universe.
Heroes and scholars, villains and monsters, they all come to the same place, for the same thing.
Their destination is Prime, and their goal is tael.