Shortly before the last, devastating war that allowed the Reckoners to ravage the Earth and turn it into a nightmarish wasteland, a trans-dimensional gateway was created between Earth and a distant planet called "Banshee". Small outposts were established in order to harvest raw materials from the planet and ship them back to Earth. When the war occurred, the trans-dimensional gate was closed, leaving no way for the colonists on Banshee to return home. Now they must eke out a living on a hostile planet, surrounded by hostile aliens. In addition, horrific supernatural monsters are beginning to appear on the planet as a consequence of the Reckoners, who are (unbeknownst to the Banshee colonists) travelling through the trans-dimensional gateway on their way to Banshee.