Imprisoned in Hydrostasis, four prisoners are commanded by an unknown entity only know as The Warden to descend into a dark, abandoned underground complex to complete certain tasks for it and come out alive. The complex has been overrun by heinous monsters given the name of Sleepers, which the prisoners will have to deal with in order to complete their job. However, as the prisoners descend time and time again to complete objectives, they will learn more about the world, The Warden, themselves, that they are not alone and that there could be a way out.