Sixteen years ago, in a world on the brink of environmental collapse, the first humans took flight for neighbouring planet, Rhea. Now, mass migration is humanity's only option. But the settled population on Rhea are no longer welcoming new arrivals. 'Earther' Bran (Stephen Moyer) has big dreams of a better life in this new world but the odds are stacked against him. Finding himself the lone survivor of a failed emigration attempt, and swiftly running out of oxygen, he's forced to hook up to a nearby Rhean supply ship. But discovering the crew dead, it^ seems Bran may have more than just a hostile planet to worry about.