97 years ago, humans on Earth decided the Cold War wasn’t enough and nuked the frak out of each other. The planet was rendered uninhabitable, and billions died, save colonies of 400 farmers, scientists, and engineers from 12 nations who made their way to their space stations. Over the decades, the space stations joined up and formed the Ark. But as time went on, the resources dwindled as the population grew to 4,000. To keep a lid on crime and so as to not waste precious oxygen, all misdeeds were punishable by death—getting chucked out the airlock into the cold clutches of space, specifically. Since even in the apocalypse you can’t go about killing kids willy nilly, anyone under 18 was kept in lockdown. The adults in charge make the difficult decision to pack up 100 teenage lawbreakers into a dilapidated shuttle and drop them back on Earth, because science.